There's literally 50 games here, you're sure to find a favorite among them.
UFO 50 is the chronicle of a fictional console that was thought to be lost, until you the player find it one day. The games do often veer into the challenging side, but that's part of the pedigree of authenticity to the era. Unlike Action 52, the games aren't shoddily constructed. Be the judge of their final quality how you want, and watch the games unfold before you. Several of them even have hotseat multiplayer!