Payday2 US $4.99 (~AU $7.15) + 2 Bonus Masks (RRP US $19.99) @ Humble Bundle

(Taken from the humble page)

Special offer! Buy PAYDAY 2 and get a Steam key for these exclusive masks for Lycanwulf and The One Below! Offer good from September 4 at 10am Pacific through September 6 at 10am Pacific.

PAYDAY 2 is an action-packed, four-player co-op shooter that once again lets gamers don the masks of the original PAYDAY crew - Dallas, Hoxton, Wolf and Chains - as they descend on Washington DC for an epic crime spree.

The new CRIMENET network offers a huge range of dynamic contracts, and players are free to choose anything from small-time convenience store hits or kidnappings, to big league cyber-crime or emptying out major bank vaults for that epic PAYDAY. While in DC, why not participate in the local community, and run a few political errands?

Up to four friends co-operate on the hits, and as the crew progresses the jobs become bigger, better and more rewarding. Along with earning more money and becoming a legendary criminal comes a new character customization and crafting system that lets crews build and customize their own guns and gear.