The Title Update 2 Title update for Happy Wars (Xbox 360) has 8 achievements worth 100 gamerscore.
Successfully use Multiple Missile team skill in Quick Match or Co-op mode 50 times total.
Successfully use Ultimate Weapon team skill in Quick Match or Co-op mode 50 times total.
Successfully use Cyclone Rush team skill in Quick Match or Co-op mode 50 times total.
Successfully use Wind Swap skill in Quick Match or Co-op mode 50 times total.
Successfully build Gatling or Rocket Launcher in Quick Match or Co-op mode 100 times total.
Kill a foe with the Repair skill in Quick Match or Co-op mode.
Kill foes with the Berserk skill in Quick Match or Co-op mode at least 100 times.
Choose Berserker, Engineer, and Zephyr at least once in Quick Match or Co-op mode.