OPM: A freshly wrecked military base doubles as your whistle-stop tour of Fuse’s high-concept weaponry. In one room, bits of scientists decorate walls and ceilings, impaled by the same deadly melanite crystals they were researching minutes earlier. In another, a turret that glows like the sun spins wildly out of control and burns the last surviving technicians to cinders. Across the way, a solid wall warps and shimmers like liquid metal, impervious to damage. And just when you thought it couldn’t get weirder, a black hole tears a corridor apart. As shop floor demos go, you won’t find many more effective.