The game listing for Depths of Evil:
Captain F. Schaeffer, Cliff Secord and other adventurers of the 30's join forces to battle an ancient evil lurking beneath the Atlantic waves!
When I got home I got a good look of the con shirt, it said "Veni, Vidi, Conquest!". Which comes out to say: "Came, Saw, Conquest!"
Off to sleep for the next day of gaming.