Pariah

999 for Weapons
Hit the tilde button (~) to bring down the console, then enter: allammo
(Thanks to xgamingguru@hotmail.com)

All Weapons
Hit the tilde button (~) to bring down the console, then enter: Loaded
(Thanks to xgamingguru@hotmail.com)

Changes Field of View
Hit the tilde button (~) to bring down the console, then enter: FOV # (Replace # with a number. Default is 70.)
(Thanks to xgamingguru@hotmail.com)

EB Games Multi-player Level
From the main menu, go to settings, cheatcodes, then enter: EBpwnz
(Thanks to xgamingguru@hotmail.com)

Exclusive PC Level
From the main menu, go to settings, cheatcodes, then enter: GameStopPwnage
(Thanks to xgamingguru@hotmail.com)

First-Person View
Hit the tilde button (~) to bring down the console, then enter: behindview 0
(Thanks to xgamingguru@hotmail.com)

Fly About and Pass Through Walls
Hit the tilde button (~) to bring down the console, then enter: Ghost
(Thanks to xgamingguru@hotmail.com)

Invincibility (but not from falls)
Hit the tilde button (~) to bring down the console, then enter: God
(Thanks to xgamingguru@hotmail.com)

Slowdown or Speed-up Time
Hit the tilde button (~) to bring down the console, then enter: Slomo # (Replace # with any number.)
(Thanks to xgamingguru@hotmail.com)

Suicide
Hit the tilde button (~) to bring down the console, then enter: suicide
(Thanks to xgamingguru@hotmail.com)

Third-Person View
Hit the tilde button (~) to bring down the console, then enter: behindview 1
(Thanks to xgamingguru@hotmail.com)

Turn off Ghost Mode
Hit the tilde button (~) to bring down the console, then enter: Walk
(Thanks to xgamingguru@hotmail.com)