On Aminet, there is a port of SDL 1.2.0 to Amiga which requires CGX3 or 4 (it says it maybe works on P96 too) and AHI.
It's not just a case of installing AmiSDL and running the games of course
You need to recompile the game's source code to an Amiga target. SDL 1.2.0 is quite old and I don't know if any of the commonly used SDL helper libraries have been ported, so you may get compilation problems with missing and changed functions.
But it wouldn't be impossible to port SDL games to Amiga, and a lot of the hard work has already been done.