Here is the info on ALL the games going on Sale .. Steam Summer Sale 2014 · US · Steam Database For specific break-up refer to the Daily thread here -- /r/Steam Official Steam Summer Sale 2014 Day 2 Thread : Steam Also a thumb rule for buying games during Steam Sales.
I would like to buy some, however looking at FPS. I really wanted to try Titanfall, but I'm not clear (read not enough time to check) if it's online multiplayer only or campaign as well.
You can play Titanfall for 48hours for free ... 48 hours end when you have completed 48 hours of game play and not two days after install