http://store.steampowered.com/app/238460/ battle block theater 1.5$ is an absolute steal, I played it through with @Sir Rahka and I think we can say we both enjoyed it very much, super fun co-op game.
http://store.steampowered.com/app/323470/ For the Dragonball fans, Dragonball Xenoverse 50% off now £20.
People might douglas me for this but I really liked this game when I first started pc gaming. Its old but still. The game is Soul Reaver: Legacy of Kain. http://store.steampowered.com/app/224920/
It's actually a pretty good game though, has all the special moves for every weapon and shit. I enjoyed it very much.
If you are someone who can be sucked into a story and become emotionally connected to characters then you might want to check out Life is Strange. This game is actually really good. It makes me feel nostalgic and the atmosphere is amazing. Since steam sales will last for another 18.5 hours you might as well try the first episode for €2.50
First time I actually did a little splurge on Steam. 4,99€ Terraria 14,99€ The Elder Scrolls V: Skyrim - Dawnguard 7,99€ Prison Architect Aficionado 0,49€ The Orion Project 13,59€ DARK SOULS™ II: Scholar of the First Sin 14,99€ The Elder Scrolls V: Skyrim - Dragonborn 11,19€ Stardew Valley