Can anyone recommend some good games?

To The Moon is -70% and it's one of the best games I ever played.

Sleeping Dogs, check some videos/game-plays. It is very similar to SR3

I hear Bad Rats is phenomenal!

football manager

depend on what type of games you like to play

Today best deal is System Shock 2 - 2,5 euro for one of the best game in history...1999 still fresh and amazing

Try Just Cause 2.

Dust: An Elysian Tail

if you don't know what to buy, that means you have no interest in what is being on sale, so what's the point of buying them?

Tomb Raider 2013 or Bioshock: Infinite

My Recommended

Dark Souls.

Nuff said.

My favorite is Ys Origin, though it's single player. Sadly we both already missed the flash sale for it, I was planning to get a copy to give.

Borderlands GotY
Borderlands 2
Portal 2
Tomb Raider
Chivalry
War of The Roses

Anything here except WarZ lol!

Recommendations

FTL is fantastic, and it's still really cheap for a few more hours. Can't recommend it enough. SOme other ones that I think are easily worth it are Borderlands 2 (as long as you liked the first one, you should love this one), Skyrim, Oblivion, Bastion, Mark of the Ninja. Though, I expect Oblivion, Bastion, and Mark of the Ninja to go on a better sale at some point in the next week.

bioshock

Thanks guys! just bought Tomb Raider + Just Cause 2 , Maybe I'll buy Sleeping Dogs too soon :)

-Oddworld: Abe's Exoddus
-Oddworld: Abe's Oddysee
-Deponia
-Chaos on Deponia
-Commandos: Behind Enemy Lines
-Commandos: Beyond the Call of Duty
-Commandos 2: Men of Courage
-Age of Empires II: HD Edition

All the games in offert.

pokemon

ARMA 2: Complete Collection for 33% off. It was 50% off a few weeks ago, I wonder if it will be 50% off again on this sale. I haven't played it but I want it, and not just for DayZ :P

Fallout 3 GOTY & Fallout:NV Ultimate Edition are both 40% off. For a nice singleplayer experience.
edit

Oh wow, ARMA 2: Complete is on the daily sale for 66% off. Fallout:NV Ultimate on daily sale for 75% off. Amazing