The game is also free on PS3 for PlayStation+ members this month. I noticed that all of the games due to be on PS+ this month (BI, Brothers, Don't Starve, etc.) were heavily discounted in the Steam sales.
Some goes for Spec Ops: The Line after playing the first two levels I preferred watching the play-through on youtube over having to kill the equivalent of whole population Staten Island one by one just to follow better than average plot.
Also what Dara Ó Briain says:
"I love video games for this reason over all other art form. They do a thing that no other art form does, right. No other art form does. You cannot be bad at watching a movie. You cannot be bad at listening to an album. But you can be bad at playing a video game, and the video game will punish you, and deny you access to the rest of the video game. No other art form does this. You’ve never read a book and 3 chapters in, the book has gone, “What are the major themes of the book so far?” You go “I, I, I don’t know, I wasn’t paying close enough att…” And the book goes THOOMP."
What? You bought an FPS (or at least a game with FPS elements). The mechanics of that, the co-ordination and the thinking, are part of the game, part of the challenge, part of the fun. If you're too old for games and would rather watch a movie, buy a movie.
Bioshock Infinite on the PC went from $60 to $10 during Amazon/Steam sales in less than 6 months.