During the game press [~] to open the console. Here type in help and all commands are listed. Most of the codes need an activation parameter, which mostly is 1 for ON and 0 for OFF. For example:

g_always_run 1

activates the permanent running and

g_always_run 0

turns that effect off again.

Bonus codes
Get to your main install directory, run file called setup-bp.exe,
choose your install language, enter these BONUS UNLOCKER CODES:

pseudodog: Unlock code #1
snork: Unlock code #2

Press NEXT button and you got the BONUS content unlocked.

pseudodog - Multiplayer map Pool, UK and US military multiplayer skins.
snork - Multiplayer map Dark Valley, French and German military multiplayer skins.

Endings
To  ensure  the correct Wishgranter ending, do not have more than
one criteria fulfilled.

Ending A: Go to the Wishgranter with more than 50,000 RU.
Ending B: Go to the Wishgranter with rank points over 1000.
Ending C: Go to the Wishgranter when Lukash and Voronin are both dead.
Ending D: Go to the Wishgranter with rank points below -1000.
Ending E: Go to the Wishgranter with none of the above criteria.
Ending F: Join the C-Consciousness.
Ending G: Refuse to join the C-Consciousness.