Reddit mentions: The best sega dreamcast games & accessories
We found 130 Reddit comments discussing the best sega dreamcast games & accessories. We ran sentiment analysis on each of these comments to determine how redditors feel about different products. We found 49 products and ranked them based on the amount of positive reactions they received. Here are the top 20.
1. Tomee HD VGA Cable for Dreamcast
- Note: please don't upgrade the firmware, it is the latest firmware version, and it will be permanently bricked if you upgrade the firmware.(Don't operate with power during installation.Please read the product instructions carefully before use.Didn't with standoffs.Thanks)
- Replace your faulty GDROM Drive with a Solid State Optical Drive Emulation Board.(Now we have customized box to packaging products to increase quality demand)
- Easy to install, the original optical drive seat can be removed and replaced with GDEMU, no welding, no modification to the machine board.
- Only suitable for VA1 motherboard DC Game machine, otherwise will damage GDEMU and do not plug in or pull with electricity
- 100% compatible with game, perfect running original GDI image, and compatible with CDI image.
Features:
Specs:
Height | 1.97 Inches |
Length | 5.91 Inches |
Weight | 0.35 Pounds |
Width | 0.79 Inches |
Release date | December 2017 |
Number of items | 1 |
2. Retro-Bit Dreamcast - Cable - VGA Cable (Retro-Bit)
Nickel ShieldedCable Length 6ftCompatible with DreamcastItem is not HDMI compatible.
Specs:
Height | 1.2204724397 Inches |
Length | 6.299212592 Inches |
Weight | 0.34 Pounds |
Width | 2.4409448794 Inches |
Release date | January 2016 |
Number of items | 1 |
3. POUND HD Link Cable for Sega Dreamcast
- SEGA DREAMCAST ON HDTV: enjoy classic Dreamcast games like Sonic Adventure, Crazy Taxi and Shenmue in high definition on a 4k TV, with our Dreamcast HD cable
- VGA CONVERTER: play many Dreamcast games on a modern TV - the Pound link cable uses the native VGA signal of the Dreamcast and converts it to digital HDMI
- CLEAN PICTURE, SHARP TEXTURES: upgrade from a standard Dreamcast AV cable to our HDMI cable for a sharper, crisper display, with clear text and no fogginess
- ACCURATE COLORS: the Pound HDMI cord for Dreamcast converts your console's analogue VGA signal into pure, digital HDMI, for an increase in color accuracy
- PLUG AND PLAY: no cable mess - the Pound HD cable seamlessly connects your Sega Dreamcast console to a modern TV via HDMI with no adapter or power supply
Features:
Specs:
Color | Black |
4. Phantasy Star Online Version 2 - Sega Dreamcast
- Final Fantasy IX
- Dark times have spread over the world of Gaia.
- Four separate governing nations, some blinded by their short-sighted greed.
- Some persevering in the name of justice, are battling on and off in a deadly game for power.
- One kingdom, that of Lindblum, headed by the honorable and trustworthy Regent Cid, finally decides to take a stand against the unspeakable massacres by the troops of Alexandria.
Features:
Specs:
Height | 0.5 Inches |
Length | 5.6 Inches |
Weight | 0.3125 Pounds |
Width | 4.9 Inches |
Release date | September 2001 |
Number of items | 1 |
5. SEGA Dreamcast Fishing Controller
SEGA Dreamcast Fishing Controller
Specs:
Height | 3.3 Inches |
Length | 12 Inches |
Weight | 1.25 Pounds |
Width | 5.6 Inches |
6. XBERSTAR GDEMU Optical Drive Simulation Board Card for SEGA Dreamcast DC Game Machine the Second Generation Built-in Free Disk
- Note: please don't upgrade the firmware, it is the latest firmware version, and it will be permanently bricked if you upgrade the firmware.(Don't operate with power during installation.Please read the product instructions carefully before use.Didn't with standoffs.Thanks)
- Replace your faulty GDROM Drive with a Solid State Optical Drive Emulation Board.(Now we have customized box to packaging products to increase quality demand)
- Easy to install, the original optical drive seat can be removed and replaced with GDEMU, no welding, no modification to the machine board.
- Only suitable for VA1 motherboard DC Game machine, otherwise will damage GDEMU and do not plug in or pull with electricity
- 100% compatible with game, perfect running original GDI image, and compatible with CDI image.
Features:
Specs:
7. Jet Grind Radio
- Cartoon dimension art style where everything looks like a 2D comic, but moves and controls are in complete 3D.
Features:
Specs:
Height | 0.4 inches |
Length | 5.5 inches |
Weight | 0.2 Pounds |
Width | 4.8 inches |
Number of items | 1 |
8. Sega Dreamcast Keyboard
Keyboard and Mouse
Specs:
Height | 2.1 Inches |
Length | 19.3 Inches |
Weight | 2.16 Pounds |
Width | 7.9 Inches |
Number of items | 1 |
9. HDMI Link Cable for Sega Dreamcast , No-Mods Required HDMI Converter for Sega Dreamcast
- 【MADE FOR YOUR DREAMCAST】Connect your Sega Dreamcast to modern HDMI televisions at the 640x480 signal resolution
- 【JUST PLUG AND PLAY】No external power supplies needed,better way to enjoy Dreamcast games with amazing image quality
- 【HD READY】Games will run at their maximum performance with clear picture quality and crisp audio
- 【COMPATIBLE】Works with any Dreamcast game that is VGA Compatible,games incompatible with VGA won't work with this cable
- 【NOTE】Some games may display off center on your TV. In order to correct the screen position, turn your TV off and then back on. You can also turn your system on BEFORE turning your TV on to avoid this
Features:
Specs:
Color | Black |
Height | 5.511811018 Inches |
Length | 2.1653543285 Inches |
Weight | 0.330693393 Pounds |
Width | 3.3464566895 Inches |
11. InterAct S-Video Cable
This high performance cable connects the Dreamcast game console to your S-video ready television.
12. VersionTECH. Stereo Gaming Headset for PS4 Xbox One Controller, Noise Reduction Over Ear Headphones with Mic, Bass Surround & LED Lights for Laptop PC Mac PS3 and Nintendo Switch Games - Camo
【Superb compatibility for multi-platform】 support PS4, PS4 Pro/slim, Xbox one, Xbox one S/X controller, PC Mac, Nintendo switch/3DS, PSP, laptop, computer, tablet, iPad, mobile phone. Note: An extra Microsoft adapter is required (Not included) when connecting with an old version Xbox one control...
Specs:
Color | Camouflage |
Height | 4.1 Inches |
Length | 7.3 Inches |
Weight | 0.5 Pounds |
Width | 8.1 Inches |
Release date | August 2018 |
Size | General type |
Number of items | 1 |
13. Sega Dreamcast HDMI Converter - Simple Plug and Play HDMI Converter For Sega Dreamcast - By Kaico - Sega Dreamcast VGA cable to Dreamcast HDMI - The Best Sega Dreamcast AV Cable
Compatible with Sega Dreamcast's from All Regions - Use Dreamcast HD on Any HD or 4K TVUses Dreamcast VGA video signal (the Highest Quality) and converts to HDMI with no audio/video lossThe next Dreamcast Evolution - Crisp, Clear Graphics with Perfect Audio TransmissionThe Best Dreamcast AV Cable Av...
Specs:
Height | 0.59055 Inches |
Length | 11.81102361 Inches |
Weight | 0.10141264052 Pounds |
Width | 1.77165 Inches |
15. SEGA Dreamcast Gameshark Lite Video Game Enhancer
New in box.
Specs:
Height | 0.5 Inches |
Length | 7.4 Inches |
Weight | 0.25 Pounds |
Width | 5.5 Inches |
17. Old Skool Sega Dreamcast AvCable Audio/Video Composite Cable
- Compatible with Dreamcast
- Works with AV ready TV's
- Compatible with Dreamcast
- High Quality durable Stereo AV Audio Video composite cabl
Features:
Specs:
Height | 1.3 Inches |
Length | 5.8 Inches |
Weight | 0.44974298511174 Pounds |
Width | 2.2 Inches |
18. Tennis 2K2
- Realistically rendered stadiums, playing surfaces, camera angles, and player animations heighten the
Features:
Specs:
Height | 0.4 Inches |
Length | 5.6 Inches |
Weight | 0.2000033640864 Pounds |
Width | 4.9 Inches |
Number of items | 1 |
🎓 Reddit experts on sega dreamcast games & accessories
The comments and opinions expressed on this page are written exclusively by redditors. To provide you with the most relevant data, we sourced opinions from the most knowledgeable Reddit users based the total number of upvotes and downvotes received across comments on subreddits where sega dreamcast games & accessories are discussed. For your reference and for the sake of transparency, here are the specialists whose opinions mattered the most in our ranking.
Eggplant Wizard
A game I adore is LA Noire. First of all, the open world didn't seem forced like in other games I had played, like Skyrim or Arkham City. The large area and nonlinear structure is actually used to tell the story, instead of telling the gamer "Hey, here's ten thousand acres. Go screw around." Next, the story is told exceptionally well. Finally, the face-reading technology they use has a wealth of great applications, such as teaching autistic children how to understand nonverbal cues. And it looks fantastic.
The game I link is Jet Grind Radio, the best copy that's within your budget. I want this game because it's one of the most creative games I've ever laid eyes on, between its story, graphics, and gameplay. It's been a game that I've wanted for more than a decade.
Scooped my PS4 today and ordered this shortly after. Not many reviews, but those that are seem pretty positive. YouTube unboxing looked good to me, too. I happen to enjoy the camo pattern, you may find it corny. Search amazon though! Hope this helps
Where are you located? Have you tried looking for independent game stores in your area? Sometimes they have some good deals, and even if they cost a little more, it might be worth it just to be able to check out the condition of the used merchandise before you buy it.
Are there any specific games you are looking for? $15+ is a pretty typical price tag for the more uncommon or high-demand titles, but there's still a lot of great stuff out there that can be picked up on the cheap. Amazon Marketplace is a great place to go for deals, and often times you can find new copies of games for around $10 or less. Right now you can get a new copy of Chu Chu Rocket for $3.94, a new copy of of Jet Grind Radio for $10.99, a new copy of Phantasy Star Online (it has an off-line game too) for $3.20, a new copy of Space Channel 5 for $4.49, a new copy of Tennis 2K2 for $3.34, a new copy of Test Drive Le Mans for $0.01, and a new copy of Tony Hawk's Pro Skater for $9.99.
headset
I would I highly recommend this pair fairly in expensive and I absolutely love them great. For the main game I play being rainbow six siege the game is all about hearing sounds and knowing where your opponent is and these work absolutely great for it.
IT'S NOT DEAD
WE CAN BELIEVE
WE CAN BELIEVE
also I uh
acquired it
on PC quite some time ago and the sound quality was like medium-ish, but I've always enjoyed lower bitrates for music, but I heavily recommend finding a dreamcast and buying that version. I've seen it go for unusual prices till I just saw some company selling these off the pallet for $20 untouched, still wrapped. Also, the sound quality is better for the dreamcast one and a year ago we DID connect to the server using my dreamcast.
I've never been so blown away when I first started up a game in my life. Definitely connect it to a high-fi system.
edit: ayy lmao
this is not the same company I purchased it from, beacuse same company sold those dreamcast keyboards for like $20 too.
This is a little bit more expensive than the cheapest Amazon offers but it has much better reviews. For me, it looks like this would be $13 shipped.
It's worth it to save the $40-$50 for a VGA cable/box though. You'll be blown away by the quality on a modern HDTV.
I also have a Bravia and I have had success using this with this adaptor and it's been working great. Good luck!
yeah well havent tried it on steam yet. you might be able to use that controller by buying this, not sure though:http://www.amazon.com/Dreamcast-Controller-Converter-Adapter-Mayflash-Sega/dp/B00K7YK0YA
You would also need this: http://www.amazon.com/SEGA-Dreamcast-Fishing-Controller/dp/B00000K2R9/
I would just recommend buying dreamcast itself. It has loads of great games and you can get it really cheaply from Amazon or Ebay and the games are fairly easy to burn on CDRs with a bit of software
Nice post. I am in the US and my set up is
Tomee VGA cable
http://www.amazon.com/dp/B00HPU96FI/ref=sr_rp_1?m=A26BKZHHS8SI0Z&ie=UTF8&qid=1457962972&sr=sr-1&keywords=tomee+vga
Etekcity VGA to HDMI upscaler
http://www.amazon.com/Etekcity%C2%AE-Scaler-Converter-Adapter-Laptop/dp/B008COJXHC/ref=sr_1_1?ie=UTF8&qid=1457963006&sr=8-1&keywords=etekcity+vga
Also need this to convert the audio
http://www.amazon.com/gp/product/B0141KPE50?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
It works great and looks amazing seeing the DC in 1080p. The only issue I had is to make sure you plug the VGA cable in tightly. It fits more snugly than it is supposed to and if it isn't pushed in all the way, it won't work.
https://www.amazon.com/XBERSTAR-Optical-Simulation-Dreamcast-Machine-Generation/dp/B07G11VW1Z/ref=sr_1_8?keywords=GDEMU&qid=1568905001&sr=8-8
This is the one I bought. Is it more expensive? Yes. But... does it have Amazon Prime 2 day delivery? Yes. Does it have Amazon backed return policies? Yes. I mean, it's totally worth it, in my opinion.
What are you trying to output to? HDTV? CRT monitor? Because sometimes the VGA is a minimal difference on HD displays, either that or you get excessive smudging and it could actually look worse. Then you'd have to introduce an upscaler such as the XRGB mini and since you're on a budget don't even look up the price of that device.
But if you are going straight into a CRT then just about anything will work but I'd recommend a "box" over "cable" any day. Just make sure you've got corresponding speakers to connect to your respective "box". Some have a 3.5mm audio jack and some have Stereo Out (red & white).
Holy Grail VGA - http://www.beharbros.com/#!hanzo/c1gph
Average Grade VGA - http://www.amazon.com/gp/aw/d/B000SL4IIG/ref=redir_mdp_mobile/185-2730549-1115359?fp=1&pc_redir=1427455287
Absolute Crap VGA cable - http://www.amazon.com/Tomee-Sega-VGA-Cable-Sound-Adapter/dp/B00HPU96FI
Hope this helps!
I'm not an expert so I defer to Google in that regards. The Akira is supposed to be good. I use a aftermarket VGA cable to upscaler. It has some issues but it definitely looks better than AV cables. Check the links below for what I currently use.
Retro-Bit Dreamcast - Cable https://www.amazon.com/dp/B01BF74KOS/ref=cm_sw_r_cp_apa_kAiJAbKSZDJV5
HDE VGA w/Audio to HDMI Video Scaler Converter Box https://www.amazon.com/dp/B009L4X3ZA/ref=cm_sw_r_cp_apa_IAiJAbDHF66SJ
Since VGA is Analog and DP is Digital, you usually need a powered adapter. Also, all the adapters I've found have been DP to VGA, not the other way around. When dealing with VGA the direction is important. I think you could possibly do it with a VGA to HDMI adapter.
https://www.amazon.com/VicTsing-Converter-Adapter-Output-Female/dp/B00K4W62R4/
Followed by a HDMI to Displayport cable.
https://www.amazon.com/Rankie-DisplayPort-Cable-Resolution-Ready/dp/B00Z05JMKO/
The best route might be a Dreamcast to HDMI adapter
https://www.amazon.com/HD-Link-Cable-Dreamcast/dp/B07BZP7HML
followed by a female HDMI to Displayport.
https://www.amazon.com/DisplayPort-Adapter-Benfei-Converter-Gold-Plated/dp/B017Q8ZVWK/
​
​
It's certainly possible, but it'll be a bit more work than I think you envisioned.
​
Edit - P.S. Be sure that the Displayport on your iMac is a displayport in and not a displayport out.
P.P.S. It seems the Female HDMI to Displayport might be one direction as well, DP-->HDMI
The easy answer is that you need to buy one of THESE and then plug it in to one of THESE.
For more money, you can buy a better quality VGA box, and a better quality upscaler. You could even get a VGA to HDMI converter and skip component altogether, if your TV has HDMI.
I'm not misunderstanding. Special production facilities are required to produce discs for most consoles. They've all got unique properties that require special production techniques and facilities to get a disc that will boot in a retail console. That's certainly true for Dreamcast, and you're right that it's a more drastic difference there (though GD-ROMS are a modification of the CD-ROM standard). Just because DVD movie/data disc production plants exist does not mean they're equipped to produce PS2 games, especially without Sony's involvement.
Dreamcast would have been the easiest console to keep producing discs for. It accepted the MIL-CD format, which are normal CD-ROMs. Unfortunately, as you might know, Sega stopped MIL-CD functionality with the later dreamcasts to curb piracy, so newer pressed homebrew discs won't work on 'newer' dreamcasts.
https://www.amazon.co.uk/dp/B07SK85NGH/ref=cm_sw_r_cp_apa_i_sGngDb97RCTET
Maybe this? I don't have one but it seems like a good option
VMU
16x Memory card
Play games on you PS1 and DC (Bleemcast disk) with the same save and memory card
Rumble pack
Even better, Rumble pack and memory in one
Samba De Amigo Maracas
VGA box
PS1 controller and keyboard adapter
Dreamcast Keyboard And Mouse
Fishing Controller
StarFire LightBlaster
Agetec Arcade Stick
Gameshark Lite Video Game Enhancer
MC2 Racing Wheel w/Pedals
Broadband Adapter
SD card adapter
Of course! Also, If you're looking for a solid HDMI cable I'd recommend this one: https://www.amazon.com/gp/product/B07HQCHRXX/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 I have one and have had 0 issues with it so far, and unlike the pound cable it works with capture cards too :)
​
I'm not sure, but I got this one and it works great.
https://www.amazon.com/Cinpel-Scart-Cable-Adapter-SEGA-Dreamcast/dp/B01JLR887O
Cool - thanks! There's one available on Amazon but the reviews aren't great. If you know of a reliable one, I'd appreciate it!
Got [these] (https://www.amazon.com/dp/B014NCYV00/ref=cm_sw_r_em_apa_i_TVB7CbD8RQA6N) on Amazon for $7.50 and they work perfect!
Hi all,
Just a quick update. The Kaico DreamCast HDMI Adaptor Revision 3 has just landed in Amazon US FBA Centre and are now on the website : https://www.amazon.com/dp/B07SK85NGH
We should also have them live on Amazon UK and both eBay.co.uk and eBay.com by the end of the week :)
I have this one from Amazon works great, a must have if you have to read lots of text or frequently use a shell on your DC.
I have one of these. Works great with my VGA to HDMI converter
https://www.amazon.com/Retro-Bit-Dreamcast-Cable-VGA-sega/dp/B01BF74KOS
This just arrived yesterday and it works great hooked up to my monitor I usually have my desktop plugged into.
POUND HD Link Cable for Sega Dreamcast https://www.amazon.com/dp/B07BZP7HML/ref=cm_sw_r_cp_apa_i_2wRUCbMC6VTGP
Just get a VGA cable...I have the Tomee VGA cable and it works great.
https://www.amazon.com/Tomee-Sega-VGA-Cable-Sound-Adapter/dp/B00HPU96FI
https://www.amazon.com/Tomee-Sega-VGA-Cable-Sound-Adapter/dp/B00HPU96FI
Lots of 1-star reviews for this one as well. Like with everything retro gaming, it's never easy and YMMV ;-)
It looks like retrogamingcables is going to have them "soon", so you can wait for that or pick up a generic one from Amazon.
For Genesis, check out this page.
CSYNC is typically what you want, when available, yeah.
I use the RetroBit VGA cable and despite needing to kind of force it in the first time, the picture quality is fantastic. I don't have it hooked up to an HDMI converter, though.
You could always just buy a Dreamcast HDMI cable these days.
That's a GDEMU drive replacement. It plugs into the connector that the GD-ROM drive would normally connect to. Mine is a clone of the original that I got on amazon. https://www.amazon.com/gp/product/B07G11VW1Z/
The white part around it is a 3D printed enclosure. https://www.thingiverse.com/thing:1585333
Edit: If you do go with a clone route for GDEMU, don't update the firmware. Just leave it. It works.
You should be able to run your dreamcast through hdmi with better graphics for 60 bucks, you simply need these three things...
http://www.amazon.com/Etekcity-1080p-HDMI-Scaling-Converter/dp/B008COJXHC/ref=pd_cp_e_0
http://www.amazon.com/Tomee-Sega-VGA-Cable-Sound-Adapter/dp/B00HPU96FI
And then a tiny audio adapter in order to connect the cables and have the audio go through hdmi, http://www.amazon.com/3-5mm-Male-RCA-Female-Discontinued/dp/B0018MI5F6/ref=sr_1_3?s=electronics&ie=UTF8&qid=1406852313&sr=1-3&keywords=red+white+audio+to+3.5mm
The Etekcity can do 720p but for some reason 1080 does not work. I first bought a Panlong, it did not work for me. The picture would show in 720 and 1080 but it scrolls diagonally and could not be fixed. I then bought the Etekcity, and although it only works in 720 it still looks ridiculously nicer than standard. I assumed it would barely be noticeable but it is a lot, though if you never played dreamcast the standard way it might not seem all that big of a deal.
Let the TV do the upscaling. Those TVs do upscaling great and any cable will be far worse at upscaling than the TV. Use the HDMI cable I bought here:
https://www.amazon.com/gp/product/B07BZP7HML/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
I just bought one of these, but ultimately I want to get a VGA-to-HDMI converter.
Should I have gotten the VGA Box instead?
[Mad Catz MC wheel for dreamcast]
(http://www.amazon.com/Sega-Dreamcast-MC2-Racing-Wheel-Pedals/dp/B000023MCL)
without a doubt the best wheel for the dreamcast
(just make sure you get the MC2 and NOT the first MC, the first one is horrid)
I used an Auron ‘HDMI Link Cable for Dreamcast’ that I was able to find on Amazon. It’s basically just a dongle that plugs directly into the video output slot on the console and then you just connect the hdmi cable to the dongle.
https://www.amazon.com/dp/B07HQCHRXX/ref=cm_sw_r_cp_api_i_4oLGDbGSGQ272
I use these just fine. Never had a problem with the two TVs I have that have VGA hook ups
Amazon Prime is the fastest way :p https://amzn.com/B07G11VW1Z
They are cheaper elsewhere ($107 on Amazon), but you get Amazon's return policy if it blows.
If you don’t want to use a component cable there’s this
https://www.amazon.com/POUND-HD-Link-Cable-Sega-Dreamcast/dp/B07BZP7HML
Its fairlyy cheap on amazon these days.
https://www.amazon.com/HD-Link-Cable-Dreamcast-Sega/dp/B07BZP7HML/ref=as_li_ss_tl?ie=UTF8&qid=1528125598&sr=8-1&keywords=pound+dreamcast&dpID=41NTgdULamL&preST=_SY300_QL70_&dpSrc=srch&linkCode=sl1&tag=metaljcom0e-20&linkId=8d1e95cb1487e8913f4ad8d95f4653ba#customerReviews
?
DCHDMI, but if you don't have the money for it, get this: https://www.amazon.com/gp/product/B07SK85NGH/
I was thinking get one of these or this. Thoughts?
Is this the cable I am looking for?
https://www.amazon.com/HD-Link-Cable-Dreamcast/dp/B07BZP7HML/ref=mp_s_a_1_2?ie=UTF8&qid=1538963231&sr=8-2&pi=AC_SX236_SY340_QL65&keywords=pound+hdmi+cable+dreamcast&dpPl=1&dpID=41s0wczCWGL&ref=plSrch
https://www.amazon.com/Sega-Dreamcast-Keyboard/dp/B00000K2R7
You arent even trying.
http://www.amazon.com/Tomee-Sega-VGA-Cable-Sound-Adapter/dp/B00HPU96FI
https://www.amazon.com/Jet-Grind-Radio-Sega-Dreamcast/dp/B00004S99S
You can get them on amazon.
Is it this one?
http://www.amazon.com/gp/product/B00HPU96FI/ref=s9_simh_gw_p63_d0_i2?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-3&pf_rd_r=0QZJ1N46KC8TEV21HX7P&pf_rd_t=101&pf_rd_p=1688200422&pf_rd_i=507846
You should search on OfferUp or Facebook marketplace to find the Dreamcast if you can! There is a way to connect a USB keyboard to the Dreamcast, but it's a pain. Everything else is an eBay thing to get!
Also, don't get the VGA to HDMI thing! I would recommend going for this:
https://www.amazon.com/dp/B07BZP7HML/ref=cm_sw_r_cp_api_fXyTBbM941B0C
Does your TV have a hdmi port? You could buy a hdmi dreamcast cord POUND HD Link Cable for Sega Dreamcast https://www.amazon.com/dp/B07BZP7HML/ref=cm_sw_r_cp_apa_i_57xBCbENXH6D7
This might work for you.
So idk if I'm getting this right your trying to use a RF cord to display the dreamcast but since you use RF to get your TV channels it's kinda blocking them if you have both plugged in the same time?? Here in the US there is nothing on channel 3 so when you set the RF cord to channel 3 it will display on that. (I could be talking about something completely so disregard that if that's not what we are talking about lol)