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Primary Collection of Cheats
Cheat Mode
Add the -console command line parameter to end of the "Target" field in the "Shortcut" properties that are used to launch the game. Start the game and the console window will appear at the starting menu. Enter sv_cheats 1 to enable cheat mode. Then, enter one of the following codes at the console window to activate the corresponding cheat function. You can also press [~] during game play to open and close the console window.
god - Invincibility.
noclip - No Clipping mode.
host_timescale <0.1 to 2> - Set game speed; default is 1.
firstperson - First person view.
ent_create_portal_reflector_cube - Spawn reflector cube for lasers.
sv_gravity <number> - Set gravity; default is 600.
thirdperson - Third person view.
ent_create_portal_companion_cube - Spawn Companion Cube.
sv_portal_placement_never_fail <0 or 1> - Toggle placing portals anywhere.
buddha - Player can take damage but cannot die.
ent_create_paint_bomb_portal - Shoot Conversion Gel out of your face.
ent_create_paint_bomb_speed - Shoot Propulsion Gel out of your face.
ent_create_paint_bomb_jump - Shoot Repulsion Gel out of your face.
ent_create_paint_bomb_erase - Shoots water out of your face.
cl_showfps 1 - View frame rate.
sv_cheats <0 or 1> - Toggle cheat mode.
notarget - Turrets will not shoot at you.
Hints
Achievements (Steam)
Air Show - Perform 2 aerial gestures before touching the ground in co-op.
Asking for Trouble - Taunt GLaDOS in front of a camera in each of the five co-op courses.
Bridge Building - Complete all test chambers in the Hard-Light Surfaces co-op course.
Bridge Over Troubling Water - Complete the first Hard Light Bridge test.
Good listener - Take GLaDOS' escape advice.
Can't Touch This - Dance in front of a turret blocked by a hard light bridge in co-op.
Confidence Building - Complete all test chambers in the Mass and Velocity co-op course.
Door Prize - Examine all the vitrified test chamber doors.
Drop Box - Place a cube on a button without touching the cube.
Dual Pit Experiment - Do the same test twice.
Empty Gesture - Drop your co-op partner in goo while they are gesturing by removing the bridge under them.
Final Transmission - Find the hidden signal in one of the Rat Man's dens.
Four Ring Circus - Enter 4 different portals without touching the ground in co-op.
Friends List with Benefits - While playing co-op, hug 3 different people on your friends list.
Gesticul-8 - Perform all 8 gestures of your own volition in co-op.
High Five - Celebrate your cooperative calibration success.
Iron Grip - Never lose a cube in Chamber 6 of the Mass and Velocity co-op course.
Lunacy - That just happened.
Narbacular Drop - Place a portal under your co-op partner while they are gesturing.
No Hard Feelings - Save a turret from redemption.
Obstacle Building - Complete all test chambers in the Excursion Funnels co-op course.
Overclocker - Complete Test Chamber 10 in 70 seconds.
Party of Three - Find the hidden companion cube in co-op test chamber.
Pit Boss - Show that pit who's boss.
Pturretdactyl - Use an Aerial Faith Plate to launch a turret.
Rock Portal Scissors - Win 3 co-op games of rock-paper-scissors in a row.
SaBOTour - Make a break for it.
Scanned Alone - Stand in a defective turret detector.
Portal Conservation Society - Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements.
Portrait of a Lady - Find a hidden portrait.
Preservation of Mass - Break the rules in Test Chamber 07.
Professor Portal - After completing co-op, complete Calibration Course online with a friend who hasn't played before.
Schrodinger's Catch - Catch a blue-painted box before it touches the ground.
Ship Overboard - Discover the missing experiment.
Smash TV - Break 11 test chamber monitors.
Stalemate Associate - Press the button!.
Still Alive - Complete Course 4 with neither you nor your co-op partner dying.
Stranger Than Friction - Master the Propulsion Gel.
Tater Tote - Carry science forward.
Team Building - Complete all test chambers in the Team Building co-op course.
The Part Where He Kills You - This is that part.
Triple Crown - Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each.
Tunnel of Funnel - Master the Excursion Funnel.
Vertically Unchallenged - Master the Repulsion Gel.
Wake Up Call - Survive the manual override.
White Out - Complete the first Conversion Gel test.
You Made Your Point - Refuse to solve the first test in Chapter 8.
You Monster - Reunite with GLaDOS.
You Saved Science - Complete all test chambers in all courses of co-op.
Unlock Bonus Store Items
Complete the indicated task to unlock the corresponding item for purchase at the store:
Unlock Alternate Title Screen
Successfully complete the game.
Singing Turrets
There is a turret inside a ventilation grate just past the elevator in Test Chamber 16. Jump over it, get the Refraction Cube, then use the laser to destroy that turret to open the grate. Enter the new area to find four turrets singing a song.
Easy "Door Prize" Achievement/Trophy
While attempting to earn the "Ship Overboard" Achievement/Trophy, once you enter the door behind the filing cabinet there are three metal doors in the hallway. If you activate the doors. Cave Johnson talks about the tests. Activate all three doors and the Achievement/Trophy will be unlocked.
Easy "Final Transmission" Achievement/Trophy
Play Chapter 2 "Test Chamber 6". Get the radio that appears in a clump of garbage into a window above the chamber after you hit a button. Work your way back through the level and place a portal on the pad across from the window. Use the launchers to get through the portal and into the room past the window, with radio in hand. Take the radio up to the wall to earn the Achievement/Trophy.
Easy "No Hard Feelings" Achievement/Trophy
Play Chapter 5 "The Escape" and reach the conveyor belts carrying droids to the incinerator. Use a portal to get onto the conveyor belt. Walk on the belt until a droid with a working laser beam appears. Pick it up to earn the Achievement/Trophy.
Easy "Pit Boss" Achievement/Trophy
Play Chapter 9. After Wheatley's surprise, portal away from the platform just as Wheatley sends arms to crush you. Do not run away on the catwalk. Stay nearby and Wheatly will beg you to come back. Stand at the edge of the pit overlooking his trap. He will ask you to just jump in the pit. Jump in to earn the Achievement/Trophy.
Easy "Preservation Of Mass" Achievement/Trophy
Play Chapter 2 "Test Chamber 7". Keep track of the Companion Cube in this chamber. You can return to get it at the end of the level after using it to depress the button. Ignore GLadOS's comments and carry the cube through the broken "Emancipation Grill" at the end of the chamber to earn the Achievement/Trophy.
Easy "Schrodinger's Catch" Achievement/Trophy
Play Chapter 6 "The Fall" and reach the 1958 "28" room. There is a cube is trapped in a glass box and Blue Gel streaming out of a pipe in one corner in this room. Save the game. Shoot a portal under the Gel and over the crate to coat the cube. The cube will bounce until it breaks the glass. It will eventually break out of the glass. Catch this cube before it touches the ground to earn the Achievement/Trophy. Note: Try standing between the entrance and the gel spout.
Easy "Ship Overboard" Achievement/Trophy
Play Chapter 6 "The Fall" and reach the 1971-era test facility. Cave will begin talking about testing on hobos. Below one of the test spheres and a giant Aperture logo is a room marked "CONTROL ROOM" in yellow letters. Use a portal to get high above the Control Room and enter the small office. There is a cabinet with a door behind it in the corner of this office. Enter that door and follow the hidden hallway to a dock. At the end of the walkway near the docks is a orange life preserver marked "BOREALIS". Examine it to earn the Achievement/Trophy. Note: This is a reference to the Aperture ship "Borealis" that is seen at the end of Half Life 2: Episode 2.