Liking Happymagenta on Facebook (developers page) will in theory unlock the Laser B.A.86 and the Shashka sword.
Also you can pay 3,000 coins to unlock the Laser and 1,000 to acquire the sword. In addition, it costs 1,000 coins to upgrade John's shotgun.
Tactical, beautiful, and wholly unique, the GOTY-winning sci-fi RTS returns with Homeworld 3. Assume control and battle through fleet combat in dazzling, fully 3D space while the award-winning story unfolds on a galactic scale.