The E3 2015 trailer for Gigantic shows off this upcoming MOBA, and the news accompanying the clip is that closed beta testing of the game is set to kick off in August. Those interested in participating can sign up on this page. Word is:

Gigantic is an online free-to-play game mixing action and strategy where teams of five players fight side-by-side with their massive Guardian monster. The enemy team and opposing Guardian will do exactly the same in objective-based battles set in a colourful world. Motiga, in partnership with Microsoft, are set to release Gigantic exclusively on the Xbox One and Windows 10 later this year. As one of the first titles, the game will specifically feature Cross-Play support allowing the players to compete across both platforms.