To activate the game's cheat console, press CTRL+~ (TILDE, the key above TAB). Once that has been done, you can enter some of the codes below to enable the corresponding effects.

Code	Effect
d_autoaim	Auto-aim
d_can_skip_cutscenes_first_time	Skippable cutscenes
d_can_skip_dynamic_cutscenes	Skippable dynamic cutscenes
d_enable_cheats_menu	Cheats menu is enabled
d_enable_level_select	Level select
g_infinite_ammo	Unlimited Ammo
p_slow_mo	Slow-motion