Let it Die, the post-apocalyptic survival game from Grasshopper Manufacture, got a surprise release at PlayStation Experience in early December. The free-to-play game has proven so popular that it has surpassed 1 million downloads a month later. 

The PlayStation 4 exclusive is counting downloads from the U.S. and European stores, and publish GungHo Online Entertainment intends to share the milestone with fans in the form of a free Death Metal giveaway on January 6-8. Death Metal is an in-game currency that allows players to revive their fighters if they die in battle. Players can get one each day by logging in and retreiving iot from their reward box. Normally, 10 can be purchased from the in-game store for $4.99.

If you are unfamiliar with the game, players are dropped into the world in only their underwear and must survive a climb in a mysterious tower that has arisen in Japan. Weapons and armor can be obtained from enemies defeated along the way, while mushrooms and certain creatures can be used as food.