Man lebt nur einmal!
-Johann Strauss II, 1855

Out of the 230+ Steam Games I own, Here's what I've managed to beat:
(In my defense most of my games are multiplayer or have no campaign)
Assassin's Creed
Assassin's Creed II
Assassin's Creed: Brotherhood
Assassin's Creed: Revelations
Beyond Good & Evil
Bioshock
Bioshock Infinite
Borderlands
Borderlands 2 + All DLC
Call of Duty: World at War
F.E.A.R.
Far Cry® 3
Grand Theft Auto: San Andreas
Half-Life 2 + Episodes
Portal
Portal 2
Prototype
Recettear: An Item Shop's Tale
Resident Evil 5
Saints Row: The Third
South Park: The Stick of Truth
Max Payne 3