Nightside (Steam key/Region free).

http://store.steampowered.com/app/360390/
NIGHTSIDE is a four races sci-fi base building real time strategy game set on the dark side of an unknown planet where the valuable "green ice" resource can be found. Follow Adam, a human explorer, as he discovers the secrets of this dark world through a story-driven single player campaign, battle online against other players or team up against AI opponents or practice solo against a challenging AI.
Key Features
14 MISSIONS STORY DRIVEN SINGLE PLAYER CAMPAIGN – follow the human explorer Adam through his journey of discovery of a dark world as he witnesses the war between two alien races while hoping that help will come from his fellow humans
ONLINE MULTIPLAYER – take control of one of the 4 races and battle against other players online in competitive matches for 2-4 players (1v1, 2v2 and CO-OP vs AI modes available)
OFFLINE versus AI – sharpen your skills in battles versus a challenging AI (18 maps and 3 difficulties available)
Other Points Of Interest
no fog of war, just lights of your units/buildings for vision
four races with different gameplay mechanics
fast paced combat oriented gameplay
intuitive and accessible interface
all races have mobile bases
good balance between micro and macro management