En total son cinco y un dlc
aca http://www.dlh.net se consiguen estos:
http://store.steampowered.com/app/253980
http://store.steampowered.com/app/253900
http://store.steampowered.com/sub/4190/

en https://gamesrepublic.com/
http://store.steampowered.com/app/91200

en https://www.indiegala.com/giveaways
http://store.steampowered.com/app/275490

y en https://www.indiegala.com/extra un dlc de magika
http://store.steampowered.com/app/202090

Juego gratis por tiempo limitado
http://store.steampowered.com/app/315260/
http://woobox com/qzxcn5 (agréguenle el punto después de woobox porque sino no me deja poner el link)

Si se registran en greenmangamming.com http://www.greenmangaming.com/s/ar/en/pc/games/simulation/welcome-pack/ como maximo a las 72 hs les envian 3 juegos (gun monkeys, canyon crappers y sanctum) mas alguna cosita extra, suerte!
http://store.steampowered.com/app/239450/
http://store.steampowered.com/app/275490/
http://store.steampowered.com/app/91600/