17. BioShock Infinite
https://www.youtube.com/watch?v=J_gEzOZKyE4 Teasing us by making BioShock Infinite initially appear to be another game set in Rapture, this trailer blew everyone's minds with the unveiling of the floating city of Columbia. The imagery has become instantly iconic, and the over-the-top 'patriotism in the clouds' makes for an unforgettable sight. Promising an adventure filled with high-up action and burning satire, BioShock Infinite's trailer was a revelation that exceeded all expectations.