7. XCOM
Originally designed as a series of strategy games by Microprose, XCOM (or X-COM, as it was originally called) is getting a revival in the form of two new games, one from Firaxis and the other from 2K Marin.
While Firaxis develops a turn-based strategy title (titled X-COM: Enemy Unknown) that's true to the original series, the developers at 2KMarin have taken it upon themselves to reimagine the game as a strategy-based FPS set in the 1950s after the Second World War.
Rather than having to face Grays (or Sectoids, as they're known in the series) and a variety of strange, but frightening aliens, players will have to deal with an odd substance not unlike the black oil in the X-Files TV series.
Vortices open throughout suburban American neighborhoods which rip humans and their surroundings apart, molecule by molecule, and it is up to an organization commissioned by the US government to investigate the attacks and put a stop to it.