Xbox Live Arcade’s first free-to-play offering, Happy Wars, turns one-year old this week and developer Toylogic is celebrating all month long. The latest in a constant rotation of events, “Wartober” merges the spook and splendor of Halloween with loads of new gear, challenges, sales, and a new playable class – the long-awaited Engineer.

Check out the event trailer below to catch a glimpse of everything on the table. Wartober is already in motion, running from October 1, through October 31.