Kowalski appears along with the CBDC agents who accompany Logan to deliver Syphon Filter related evidence to the USA. En route, Agency F-22 fighters shoot down the C-130 transport carrying the team and cargo. In panic, Logan and the CBDC agents jump off the plane and parachute down, all landing on the Colorado mountain. Kowalski, being the unfortunate one, injures his leg, possibly breaking it, and rendered immobile. He is forced to rest with two other CBDC agents watching over him.
Soon after it is discovered Angency paratroopers are in the area and a tunnel out is blocked by a thug's attack, Logan is informed by his accompanying agent that Kowalski possesses C4 explosives. Running back to Kowalski's location, Logan receives a transmission saying: "This is Kowalski, we're under fire- UGH!!".
By the time Logan returns to Kowalski's location, the latter and his fellow agents are revealed to be dead. Logan retrieves the C4 from Kowalski's body and leaves.