Donators on Steam receive access to work-in-progress features, early development builds, private servers, and an in-game icon showing your support. By becoming a donator on Steam, you are also helping to create a free game for the entire world to enjoy. Thank you.

Operation: Rolling Stone includes new weapons, maps, and content featuring the Vietnam War, and will be released for free upon completion. By donating to receive early access to the Operation: Rolling Stone update, you are helping support continued free content updates for Operation: Harsh Doorstop.

Operation: Michael includes new weapons, maps, and content featuring World War I, and will be released for free upon completion. By donating to receive early access to the Operation: Michael update, you are helping support continued free content updates for Operation: Harsh Doorstop.

Operation: Overlord includes new weapons, maps, and content featuring World War II, and will be released for free upon completion. By donating to receive early access to the Operation: Overlord update, you are helping support continued free content updates for Operation: Harsh Doorstop.