The Zero Dark core rulebook contains all the rules you need to play the innovative new 28mm sci-fi skirmish game from Precinct Omega, including Operation Gemini. Print (£20) & PDF (£15) Editions available. Link to Wargame Vault.
Zero Dark: Training Run is a condensed version of the rules, with either heroes to choose from and an exclusive solo/co-op mission. Pay What You Want. Link to Wargame Vault.