Treyarch community manager Josh Olin announced today the release date for Call of Duty: Black Ops First Strike DLC for PC. The DLC will be available on Steam on March 25. A pre-purchase offer is also going on for DLC, gamers who purchase it before launch date will get 10% off of the pack. Black Ops First Strike DLC features five maps, out of which four are multiplayer maps and one zombies map. The four multiplayer maps are Berlin Wall, Discovery, Kowloon and Stadium, and one zombies map is Ascension.