(This is a time as good as any to stop lurking. Hi, everyone!)
Mostly I've been playing Space Station 14, a reimplementation of Space Station 13. It's a computer RPG that feels a lot like a tabletop RPG played by dozens of people at the same time. It's full of potential for dramatic fun, but it can also be a sour experience sometimes. It's mostly good, though.
It's mostly libre (MIT + CC BY-SA), but they throw in some non-libre stuff (CC BY-NC-SA and proprietary)... can they even do that?
I also did try this 7DRL game, Mosaic. It's a mashup of broughlike and 3-in-a-row that works, but... meh. Non-libre.
@Peter DreamWeb looks great! I keep telling myself I need to try Battle for Wesnoth... it looks like a masterpiece, but maybe not my jam...
@ffaf I got good memories from playing Within a Deep Forest and Knytt.
@mdtrooper Gosh, I spent a lot of time on that puzzle collection! The Android implementation is great. My favorite is Loopy, though recently I discovered that handcrafted Slitherlink tends to be a lot more fun...
@Technopeasant I REALLY WANNA PLAY QUAKE RRRRAAAAA!! I know the levels themselves are libre, but I really wanted the original graphics and sounds. Bought it on a discount recently, but haven't gotten around to it yet.