Game: Irukandji 2
Screens and description are from original Irukanji - sorry for that, I'll update them when Irukanji 2 will be released.
I played tons of games, including those ALL from Humble Bundles, all large FPS, assaultcube, paintball, smok'gun, q3rally, openarena, quake3/live/4, doom3, tremulous, globulation2, warzone2100, glest(mega), widelands, wesnoth, Nexuiz/Xonotic, Savage1/2, Urban Terror, and more more, nearly 200 high quality games, imo. NOTHING MATCH ZERO-K.
On the same engine, Kernel Panic bring me back to RTS then CA(once ZK was called until last Sep) get me Crazy.
Zero-K is the stop in my gaming life, it get me bad and lazy to try other games, as i stay in lobby waiting a game, I feel anything other games not fun, I rather to do study while I wait.
This game ate 5~6% of my life last year.
I don`t know about 2 years ago but Xonotic has more "eye-candy" style in it than Nexuiz with plenty of changes. This means that the team behind it is working to prove that open source can produce something really really good.
I hated so much Dofus, that I won't even get close to this one.