4. BioShock
https://www.youtube.com/watch?v=rrqfPG4ZcAA#t=104 Deep, dark and violent, the BioShock trailer wasn't just incredibly exciting, but also a perfect representation of the game. The game and the series it's part of has since gone on to be known for the incredibly atmosphere and compelling narrative, and that's exactly what this trailer manages to bring across. Introducing the underwater city of Rapture, this exceptional trailer was like nothing gamers had ever seen before.