Mass Effect 2 and Deus Ex, what else is there to play?

I love those two games; there's any other good game with some of the aspects of those two games? regarding the gameplay and the decision making through the game. Much appreciated.Mass Effect 2 and Deus Ex, what else is there to play?
gears of war 3
Dragon Age: Origins and Dragon Age 2

Also, the Splinter Cell series is better at stealth.Mass Effect 2 and Deus Ex, what else is there to play?
Dragon AG\ge: Origins. and NOT Dragon Age 2.
The Fallout games, Oblivion.Mass Effect 2 and Deus Ex, what else is there to play?
KotOR and DA
Dragon Age 1/2

Fallout 3/NV

Maybe Oblivion (Soon to be Skyrim)

Witcher 1/2

Star Wars KOTOR 1/2