Today, we’re excited to announce that Call of Duty: Heroes has surpassed 30 million downloads globally*, and to celebrate, we’re launching a major update that includes an all-new Perk System and Challenge Mode. A free-to-play combat strategy game for smartphones and tablets, Call of Duty: Heroes lets players take control their own military outpost, forge an army of elite soldiers, and build defenses drawn from or inspired by the Call of Duty universe.

Building upon the major 2.0 update introduced in November, version 2.4 of Call of Duty: Heroes will let players enhance their troops and bases with unique Perks, like Override, which increases troops’ offensive power, Stronghold, which bolsters base defenses, and Micromanagement, which optimizes base economy and resource generation. Perks can be earned and unlocked through Helipad Supply Drops, in-game events, or the all-new Challenge Mode.

Challenge Mode introduces a new way to play, wherein players are given a set amount of troops, Heroes, and Killstreaks to clear a series of seven stages with increasing difficulty. Clearing stages rewards players with resources and Challenge Coins.

Call of Duty: Heroes is available now via the App Store, Google Play, Windows Store, and the Amazon Appstore.

*According to Activision Blizzard internal data.