ArcheBlade is a free to play MOBA style multiplayer fighting game that came recently out of beta phrase and officially launched on Steam. Here's the official trailer. For more details or start playing the game, check out the official Steam page.
Although do keep in mind the game currently has problems according to the player discussions since launch. They're stating it's pay to win and unbalanced compared to beta. Some also claim that it's hard to join a game or round especially as a newcomer.