To celebrate the 1 year anniversary of the release of Titanfall the developers have made its season pass free on all platforms. If you missed out on playing this game now might be the time to give it a shot.
Titanfall is developed by former infinity ward developers, Respawn Entertainment. In turn it plays an awful lot like Call of Duty title only it adds a parkour element as well as giant fighting robots.
Titanfall is definitely not game of the year material, but it can add some serious deviation to the typical FPS style of game-play by adding unique mech based game modes along with a myriad of familiar FPS game-types.
Apparently the Season Pass is free indefinitely (thanks Garrett)
@deathspankd This content is free starting now and will remain free for all users who purchase Titanfall for Xbox One, Xbox 360 and PC
— Titanfall (@Titanfallgame) March 11, 2015