This is a DSi mode version by Sektor of Dopefish's modified version of Sektor's dualHexen, a port of Hexen to the Nintendo DS. Note that Sektor's version is itself a modification of Rich Whitehouse's hexenDS.
You can get older ones even like the pi 3,4 for cheap, but they don't play gamecube, Wii etc very well. Be warned they use a Linux os, which you need to load onto a micro SD card yourself. You can find pre built images like "retro-pie" online free tho which makes it easy to setup.