Defied my expectations
I honestly wasn't expecting much from most of the included games, but they've all surprisingly been a blast to play. That said there isn't much variety among them. 3 of them are scrolling action games like Streets of Rage or Final Fight and the last one is a 1 on 1 fighter like Street Fighter II. Rival Turf is easily the simplest of the scrolling action games, but even that one was a blast to play, and each one has some unique charm and feature to them that makes them great to come back to. The Peace Keepers even has a 4-player mode, in case you have an SNES multitap. Each one of these games is great with friends too.
Side note, you will notice The Peace Keepers has no music during gameplay by default and that there is a setting in the options menu to turn the music back on. Don't do it. The music is so awful it's better to keep it off. Just play your own tunes from your phone or something if you want.