RWBY: Grimm Eclipse is an action-packed, 4-player online co-op game based on the popular animated series, RWBY. Developed by Rooster Teeth Productions, this game takes players to the familiar locations of Remnant, as well as new areas not seen in the show. Players can choose from four characters - Ruby, Weiss, Blake, and Yang - each with their unique abilities and upgrades to battle against the Grimm.

The game features fast-paced hack and slash gameplay inspired by Dynasty Warriors, as well as team play elements from Left 4 Dead. The storyline is exclusive to the game and introduces new locations, enemies, and a new villain never before seen in the show. The game also features full voiceovers from the cast of the show, plus new voice talent.

In addition to the exciting storyline, the game offers ranked challenges, unlocks, and achievements. There is also a Horde Mode that features three unique maps focused on intense co-op action, strategy, and defense turrets. Players must protect security nodes and survive waves of Grimm. Overall, RWBY: Grimm Eclipse is an engaging, co-op combat game that combines thrilling missions and storytelling.