To see pictures of Quake 2 staff, first defeat the final boss. Then search the grounds for a stress fracture that has formed during the struggle. Shoot the crumbling surface and enter the crawl space.
To reach the secret level, go to level 3 (in the first unit) and walk forward until you see a large pool. Two Light Guards and an Enforcer patrol the area. Kill them and grab the Re-breather that they protect, activating it by pressing the B button. Now wade into the pool and slither through the large crack in floor. (You will have to duck because you're too big to enter any other way.) Once you have crawled through the crack, search for a narrow tunnel. The tunnel will lead to a tiny oasis. And once there, push the Space Bar until you discover a small "secret" room. In the room, two bodies lie next to an elevator. Step over them and push the elevator button. You�ll descend to a secret level!
In the Receiving Center (Unit 5), go to the area where you see a waterfall. With a running start, jump over the ledge and into the falls! You should land in a small corridor.
The Give command brings forth an item or object, player or enemy. To �give� an object, push the Tilde key [~] and type "Givex" where x is the singular form of the desired item (without spaces).
Here are a few examples:
Push the Tilde [~] key to bring up the console. Then type in one of the following cheats:
To acquire 999 health, type "give health 999" and push Enter.
Note: If you collect other health items, your health meter will go back to the normal 100 health.
Type "Crosshairx" where x is the magnification constant; then push Enter.
Note: X is a value between 1 and 5.
Type "Sv_gravityx" where x is the gravitational constant; then push Enter.
Type the tilde and then type "god". Press return and you will be in God Mode.