"Oh, you don't know what Karlson is?" he muttered to the empty room. "It's just a little game I'm working on..." He stepped into the light, ready to do it all again.

The lab's security system screamed. Lasers crisscrossed the corridors, and massive fans threatened to blow him into the abyss. Karlson leaned into the chaos. He wall-ran along a curved glass partition, used the recoil of a shotgun to boost himself over a wall of spikes, and smashed through a vent.

"Movement is key, Karlson," a disembodied, slightly mocking voice echoed through the intercom.