Men of War : something of the pain, and loss or destruction
Splice : something of an infection, unexplained illness
Dota 2 : tactics, Aligning with the team , team work
Greed: Black Border : mutants, the future, or insects
Rochard : hmm .. Weightlessness, space, new technology
Trine ; adventure, challenge or fun
Super meat boy : Traps , or samething about this .
Patrician IV : Power, conquests, neighboring territories, fight, domination Govt, Trade

This is my suggestion :P