GURPS Vehicles: Biremes and Triremes (CFP, Carolyn Stein & Stephen Kenneth Stein) has a call for playtesting.
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"The material presented here is a community original creation, intended for use with the GURPS system from Steve Jackson Games. This material is not official and is not endorsed by Steve Jackson Games."
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GURPS Vehicles: Biremes and Triremes (CFP, Carolyn Stein & Stephen Kenneth Stein) has a call for playtesting.