Developer Cheat Codes...
	Jewel of the Nile...
	Various Steam Achievements...

Press the console key ` and type "cht_bEnableCheats = 3" to enable the developer cheats. Note that console commands are case sensitive. You can access the cheats through the menu (Press ESC then press F3) or by typing them into the console. (Type "cht" into the console and press TAB for a list of cheats.) Doing this however will invalidate your achievements and leaderboard score gained in that session. Type "cht_bEnableCheats = 0" in the console to disable the cheats for the next session.

Effect	Code
Auto aim cheat.	cht_bAutoAim
Display all the messages in NETRICSA.	cht_bShowAllNetricsaMessages
Enemies can't see you.	cht_bInvisible
Fly around and pass through walls.	cht_bGhost
Fly around.	cht_bFly
Gives a specified amount of ammo for a specified weapon.	chtGiveAmmo()
Gives a specified amount of armor.	ch_slGiveArmor
Gives a specified amount of health.	cht_slGiveHealth
Gives a specified weapon.	chtGiveWeapon()
Gives all available weapons and maximum ammo.	cht_bGiveAll
God mode.	cht_bGod
Greatly increased speed.	cht_bTurbo
Infinite Ammo.	cht_bInfiniteAmmo
Kill all enemies in line of sight except for bosses.	cht_bKillAll
Kill the current boss.	cht_bKillBoss
Unlocks Mental Mode. (Also available through the custom difficulty menu or by beating the game on Serious)	cht_bUnlockMentalMode

Complete the Jewel of The Nile single player campaign.

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Apprentice Egyptologist	Decipher an Egyptian text.
Arachnophobia	Rip 10 Juvenile spiders apart.
Are You Serious!?	Complete the game in single player on unmodified serious difficulty.
Beast Hunter	Complete a Beast Hunt match
Berserker	Kill 3 enemies in one sprint with the Sledgehammer.
Bone Crusher	Smash 20 Kleers with the Sledgehammer.
Bug Hunt	Squash 10 Hatchling spiders.
Cardiac Surgeon	Rip out 10 Rocketeer hearts.
Chain Explosion	Kill at least 5 headless kamikazes in one explosion.
Chiropractor	Break 10 Soldier necks.
Circle of death	Kill at least 3 enemies in one spinning Sledgehammer attack.
Classic Outfit	Find sam's classic outfit
Clay Pigeons	Kill 5 Cave Demons while they're in air.
Co-op Beginner	Complete any level in cooperative with at least 2 players.
Co-op Master	Complete the campaign in cooperative with at least 2 players.
Coin-op Co-op	Complete a Coin-op cooperative game on normal or higher difficulty.
Deathmatch Beginner	Complete a deathmatch game with at least 1 frag.
Deathmatch Master	Win 10 deathmatch games.
Flag Thief	Score a total of 10 points in CTF matches.
Get the hell off my ride!	Secure the bird.
Gold Rush	Pick up 100 gold coins.
Golden Survivor	Earn a gold medal in Survival.
Hammer Time	Frag 20 players with the Sledgehammer.
Headsman	Decapitate a Khnum.
Heavy Weight Champion	Win one My Burden match with at least 3 players.
Instant Killer	Make at least 3 kills in one Instant Kill match.
Killer Jewelry	Kill an enemy using the Mutilator.
Kleer Wrestler	Tear off 10 Kleer heads.
Kung-fu Fighter	Perform all possible finishing moves in the game.
Last Man Standing	Win one round in Last Man Standing game with at least 4 players.
Life Saver	Pick up at least 10 extra life items.
Load of Scrap	Rip scrapjack's head off.
Look Ma, I won!	Win a versus match.
Look, it's a secret	Find at least 50 secrets in single player.
Maintenance time	Blow a Major Biomechanoid into pieces.
Master Egyptologist	Decipher all Egyptian texts.
Mission completed	Power up the Timelock.
Old School	Complete the game in single player without manually reloading, aiming or sprinting.
Ophthalmologist	Remove 10 Gnaar eyes.
Painful Divorce	Kill a Witch-Bride of Achriman.
Problem solver	Solve the riddle of the Sphynx.
Queen Hatshepsut	Complete The Guardian of Time in single player on serious difficulty without dying or loading.
Rodeo Surfer	Use the Mutilator to surf after a Werebull.
Scorpion Slayer	Break 5 Arachnoid necks.
Serious Beginner	Complete any level in single player.
Serious Run	Complete the game in single player in half the estimated time on each level.
Serious Sam	Complete the single player campaign.
Skewer	Pierce 5 enemies with one Devastator round.
Survivor	Earn a medal in Survival.
The doorman should wear a suit	Awake the Guardian of Time.
Top Secret	Find all secrets in single player.
Trick Shot	Kill the kicked enemy while it is still in the air.
Up Close and Personal	Gib 20 enemies from close range with a shotgun.
Useful Trophy	Kill an enemy with a gib torn from another enemy.
Vista	Find the Vista secret.
Wall of Bullets	Kill 20 enemies with the Minigun without releasing the trigger.
Wanted Dead or Alive	Rescue professor Stein. So to say.