Mercenary Kings from Tribute Games is available now through Steam's Early Access program. The game will be regularly priced at $20 when it officially launches, but is currently $15 during this audition period. The co-op shooter is also available in a four-pack for $44.99.

What's the difference between Mercenary Kings now and its final, killer state?

"It currently has 60 missions whereas the completed version of the game will have over 100," notes Tribute. "This version of the game still needs your feedback to get it in the best possible shape and it's why we are releasing it now!"

The game is also planning contracts with (as far as we know) Ouya and PlayStation 4 sometime after PC. Tribute Games was founded by the Scott Pilgrim vs. The World vets that went on to make Wizorb.

This article was originally published on Joystiq.