Level names...
	Various Codes...

Use one of the following entries with the map code.

hospital
factory
institute
black_shark
submarine
prison_outside
prison_inside
bunker_surface
bunker_underground
ze8_complex
ze8_core
ze8_incubator

Edit config.ini in the game directory (open it with Notepad) and add the following text to the end:

bindc+DIK_GRAVE(console_showhide)

Now in the game hit tilde (~) and enter any of these codes.

sv_cheats 1 - enables cheats
game_godmode 1
suicide g_developer 1
cl_showinfo 1
g_fly 1
g_noclip 1
map mapname