http://www.gamesas.com/topic/1433520-game-sales-and-deals-steam-gog-gamersgate-impulse-desura-etc/

This thread is for the discussion of gaming deals found on http://store.steampowered.com/, http://www.gog.com/, http://impulsedriven.com/, http://www.desura.com/, http://www.greenmangaming.com/and other sites or stores.

See also the http://www.gamesas.com/topic/1398244-unofficial-is-insert-game-name-here-any-good-thread/, for advice on games you're considering.

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Currently http://store.steampowered.com/app/49520/http://store.steampowered.com/app/49520/ on Steam. Also 50% off is http://store.steampowered.com/app/214360/, also on Steam.