gameplay in Half-Life

Half-Life crossovers - Rift
(left = Gina Cross/right = Barney Calhoun)

Half-Life crossovers - Good morning Gordon!
(left = Barney Calhoun/right = Gordon Freeman)

Half-Life crossovers - Forget about Freeman!
(left = Gordon Freeman/right = Adrian Shephard)

Half-Life crossovers - Apprehended

(left = Gordon Freeman/right = Barney Calhoun)

the entirety of "We've Got Hostiles!" in 5 minutes beacuse why not really

Half-Life 2 - the first map of "We Don't Go To Ravenholm..."