Essential 2K Collection is 70% on Green Man Gaming, PlayFire "paid-to-play" special running

2K Games and Green Man Gaming have teamed up to bring you the Essential 2K Collection which not only gives you 70% , but hands you four free titles, and an additional 50% off voucher to spend.

So here's how it works: the collection includes BioShock Infinite, Borderlands 2, Civilization 5, and XCOM: Enemy Unknown. The four free games are: BioShock, Borderlands, Civilization 4 Complete and X-Com Complete Pack. Each has it's own Steam key as well.

There's more going on this weekend at GMG as well: Playfire Rewards are attached to a selection of 2K games which means those who participate will be paid to play the games. The credit earned can then be put towards anything on the Green Man Gaming store.

And it's not just 2K games you will get paid for either. You can get "paid to play" Resident Evil 4 HD, Payday 2, Castlevania: Lords of Shadow 2, Thief and more.

Hit up the PlayFire blog for more information.