I would've thought about posting this later when they added the rest of the games if it wasn't posted about by then. But here are the ones I know.
Lara Croft and the Guardian of Light - I got this free from Xbox's Games With Gold. I found it interesting as time waster until I got to the giant rolling pin of death.
Hitman: Absolution - I got this free from both PS Plus & Games With Gold. I've never played the other Hitman games which I've read are better. I've enjoyed this till I got lazy & refused to do a shooting gallery mini game. Just killing people with Piano Wire was way more fun for me.
Deus Ex: Human Revolution - I got this free from PS Plus. I don't remember if it was the Director's Cut or not. I really enjoyed sneaking around during the tutorial. But after getting into the actual missions I had the urge to kill everyone with my robotic arms. I'm looking forward to becoming death proof & killing everyone with my robotic arms. Well assuming I can mod the PC version to do that.
Just Cause 2 - I got this free from PS Plus. And I have to say JC2 is way more fun than GTA5. JC2 even has similar gameplay mechanics to GTA5 minus submarines & sharks. But even better as JC2 has multiple islands so boats can have an actual use of getting somewhere. Its so huge it might make Skyrim feel bad about its Dragons you can only ride & its boats that are stuck in docking positions. JC2 makes cars surfing fun instead of a mini game like Saints Row because now you can shoot & not worry about falling off. JC2 has a grappling hook like Link & Batman, but unlike those 2 it also doubles as a way to hook 2 items together to cause all kinds of chaos. However this game falls apart in story progression due to needing to cause chaos just like how Saints Row 1 & 2 require you to earn Respect before you can actually play the next mission.
I'm kind of hoping they'll add the first Just Cause to this list of games. Even though JC2 is basically already that. But with better graphics.