I’m looking for recommendations for my Linux setup. But shattered pixel dungeon is amazing on android
Open source game based on Transportation Tycoon Deluxe.
Mindustry is neat if you like tower defenses and factory/automation games.
[edit] Though this isn’t exactly a game, I thought I’d mention it: The Powder Toy. Really fun physics-ish sandbox game if you like just playing around with little particles or making electronics or nuclear powered fireworks shows, etc.
0AD! It’s similar to age of empires
Not a very original answer, but I still enjoy The Battle for Wesnoth after many years.
I’m surprised hardly anyone else has mentioned Wesnoth yet. I last played it over a decade ago, so I’m not sure if it’s still as well-known now as it used to be, but it’s one of the highest-quality open-source games out there.
It’s a turn-based fantasy strategy game that feels like a combination of Advance Wars, Fire Emblem, and D&D. And I suppose it was a lot more unique back in the 2000’s when there weren’t a dozen indie games out there that fit the same description.
3 out of 4 begin with “Super”!