Tera developer En Masse Entertainment today announced that its free-to-play PC shooter Mercenary Ops 2 will be released in North America this summer as Zombies Monsters Robots (ZMR). The game launched in China in 2012 and has attracted 30 million players so far.

In development at Yingpei Games (formerly known as Epic Games China), ZMR is a third-person shooter set in an alternate world in which Earth finds itself under attack. Players will use “guns, guts, and gear” to fight their enemies in the multiplayer games.

“We are excited because ZMR brings a fresh and thrilling experience to PC shooters. Playing the huge variety of co-op missions, facing crazy monsters and boss battles, and the intense PvP is going to keep gamers coming back for more,” En Masse Entertainment CEO Chris Lee said in a statement.

ZMR features a variety of game modes, including a co-op campaign and wave-based survival missions, as well as a head-to-head competitive mode. The game’s co-op mode supports up to eight players, while the competitive mode lets up to sixteen players duke it out. New content will be released for the game on a monthly basis, the company said.

An alpha test for the game will be available in April before ZMR’s full launch “early” this summer.