The cliché comparisons are Bioshock, Half-Life 2, and Assassin's Creed.
Bioshock-comparison to the dual-wield playstyle of combining powers and weapons. It just looks like it, doesn't play anything like it.
Half-Life 2-scripted FPS. The games' looks are similar due to Viktor Antonov working on both of them. They don't play the same at all.
Assassin's Creed-neither looks nor plays like it. Third person Action with a lot of platforming and assassinating people. And seriously people are actually defending Assassin's Creed of having stealth segments. It has those and you can play stealthy but it really isn't hard to do so and when the game forces stealth upon you it really screws up the pacing.
If you want similar gameplay then go with Thief, Deus Ex and Dark Messiah, those are your best choices.