3089 -- Futuristic Action RPG (Steam key/Region free).

http://store.steampowered.com/app/263360/
Features of 3089
Limitless terrain is smoothly generated in all directions
Unique quests made from individually generated task lists
Weapon construction & customization based on individual parts
2-player co-op multiplayer; join up with your buddy to make a super-robot!
Interesting storyline with multiple endings
Cool abilities like gravity guns, time stopping, cloaking, short-range teleporting & more
Unique building features that allows blocks to be placed of any size or rotation
Friendly & aggressive robots that range from small to very large
Varied combat scenarios mixing stealth, melee and projectile weapons
Exceptional draw distance with low computer requirements
Dynamic lighting & smooth day / night transitions
Smooth weather system including dangerous lightning & realistic rain
Dynamic shadows being cast by the sun
Integrated physics engine
Compatible with Windows, MacOSX & Linux