20 Android 'hidden gems,' i.e. excellent, mostly free, mostly lesser-known games.

• https://play.google.com/store/apps/details?id=air.com.boopsgames.asterius - Terrific, sprawling, puzzle-ish roguelike, easy to play but with lots of secrets to discover, and a long learning curve to win. (note: I’ve written a guide with hints, which I’d only recommend using as a last resort)
• https://play.google.com/store/apps/details?id=stayinsidegames.com.SIG.BHSL - Ah, so delicious. It’s a fun roguelike, a bit like Pixel Dungeon, but with more condensed runs, and loads of character. As with PD, you’ll move through different stages and battle different end-bosses.

(thanks for reading; the other 18 are in the link)