I don't want to enroll in the giveaway, just to give my hearty recommendations to the first two games, definitely worth buying.
Cosmic Star Heroine is a really fun jRPG(-lite? I've never really played the genre). Quite linear, but a very cool storyline. I believe there is a "base" to unlock, not sure if there are any special features there or just rooster changing, but it's definitely a very fun game.
Battle Brothers is like the tactical RPG version of Mount and Blade. Quite hard (and slower going, since you can't just kill stuff using your hero to "reboot"), but it seems like there's a bunch of tactics more to discover. Design as a whole feels very tight, there's just enough of everything for variety but not to be overwhelming. Not sure if there is much end-game content, or if it devolves into M&Bs repetitiveness, but definitely under a buck for an hour of entertainment.