In addition to surfing, Knox was also involved with the video game Left 4 Dead released by Valve Corporation in 2008.
Grateful Dead | The Walking Dead | Dead Kennedys | The Walking Dead (TV series) | Left-wing politics | Dawn of the Dead | Dead Sea | Night of the Living Dead | Dead Can Dance | Dead Sea Scrolls | Dead Prez | Shaun of the Dead | Day of the Dead | Dead Like Me | The Dead Zone (TV series) | The Dead Zone | The Dead Boys | No Child Left Behind Act | Dead of Night | The Evil Dead | left-wing politics | James Joyce's The Dead | Democrats of the Left | Dead Silence | Dead End Kids | The Walking Dead (comic book) | The Queen Is Dead | The Dead Milkmen | Republican Left of Catalonia | left |
Lowrie has notably performed roles in video games such as The Suffering and The Suffering: Ties That Bind, Total Annihilation and its expansions, The Operative: No One Lives Forever and No One Lives Forever 2: A Spy In H.A.R.M.'s Way, and Valve games Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Left 4 Dead, Team Fortress 2 and Dota 2.
This can also happen in Source engine games including Half-Life 2, Counter-Strike: Source, Left 4 Dead, and Team Fortress 2, where if a mapmaker has not set the correct properties on a floor (disable shadowing, etc.), the shadows of the players above will show through.
With over 70 games under his belt, some of his recent work include Silent Hill: Homecoming, Resident Evil 5, Ghostbusters: The Video Game, Left 4 Dead, Left 4 Dead 2, Uncharted 2: Among Thieves and the upcoming Pirates of the Caribbean: Armada of the Damned Action-RPG.
Like its basis game, Pixel Force: Left 4 Dead allows players to play as one or two of the four survivors: Bill, a Vietnam veteran; Francis, a biker; Louis, an office worker; and Zoey, an aspiring film director.