After combining two broken Amiga 500s into one single working one, I had an Amiga case and an Amiga keyboard left over. The nice thing about the Amiga keyboard is that it is pretty much a serial device, so it wasn't hard to set up an Arduino Pro Micro to act as a keyboard-to-usb adapter.

Then I put in a Raspberry Pi with a Retropie SD card, two gamepads, a mouse, and that's all.

I didn't put a lot of effort into making it look nice, so it's basically just a bunch of cables coming out the back of the Amiga, but at first glance it's still an ordinary Amiga.

Works pretty well overall for Amiga, C64, Spectrum, Atari, and DOS games. Of course boot time is not great, and add to that the time spent navigating Retropie's menu system, it's all a bit of a hassle. It does work better than my actual Amiga for "productivity" applications because I can set it up with more memory and better networking options.

I've got a RPI with RetroPi, it... sorta works, but the cheap controllers aren't very good, and there's a noticeable input lag in games like Mario Bros. N64 games don't get a decent framerate. Mind you this is with an RPI 2 or 3 so not the best hardware either.

I got a refurbished N64 as well, works as intended.

I’m putting one together soon. The retrotink ultimate stopped being made last year, which is very sad. The community hasn’t picked up the source yet. It’s a matter of time though. I’m going with a PI2SCART for video output. I would use this Raspi 400, but the GPIO location is not well suited for hats.

I’m going this route because I also want the flexibility to have a computer on my CRTs. If you want pure gaming, then look into MiSTer FPGA.

One of the YouTube reviews deals specifically with retro gaming on the Pi 400: https://www.youtube.com/watch?v=nopc7mJUDkM&list=PLcd1Q0-YkB... — also that channel spent a little time rendering some concepts for more retro-looking Pi 400 designs.