Bu sene içinde çıkacak onlarca iddialı FPS arasında gölgede kalmayacağını düşündüğüm oyunun PC, PS3, Xbox 360 ve Mac platformlarına çıkacağını hatırlatalım. Puzzle'lar arasında kendimizi bulacağımız yapım, düşündüren yapısıyla özgün bir oynanışı benimsiyor.
Good Listener (5) - Take GLaDOS' escape advice.
High Five (5) - Celebrate your cooperative calibration success.
Pturretdactyl (5) - Use an Aerial Faith Plate to launch a turret.
Scanned Alone (5) - Stand in a defective turret detector.
Wake Up Call (5) - Survive the manual override.
You Monster (5) - Reunite with GLaDOS.
Asking for Trouble (10) - Taunt GLaDOS in front of a camera in each of the five co-op courses.
Bridge Over Troubling Water (10) - Complete the first Hard Light Bridge test.
Can't Touch This (10) - Dance in front of a turret blocked by a hard light bridge in co-op.
Confidence Building (10) - Complete all test chambers in the Mass and Velocity co-op course.
No Hard Feelings (10) - Save a turret from redemption.
Portrait of a Lady (10) - Find a hidden portrait.
SaBOTour (10) - Make a break for it.
Ship Overboard (10) - Discover the missing experiment.
Team Building (10) - Complete all test chambers in the Team Building co-op course.
Undiscouraged (10) - Complete the first Thermal Discouragement Beam test.
You Made Your Point (10) - Refuse to solve the first test in Chapter 8.
Bridge Building (15) - Complete all test chambers in the Hard-Light Surfaces co-op course.
Dual Pit Experiment (15) - Do the same test twice.
Gesticul-8 (15) - Perform all 8 gestures of your own volition in co-op.
Obstacle Building (15) - Complete all test chambers in the Excursion Funnels co-op course.
Stalemate Associate (15) - Press the button!
Still Alive (15) - Complete Course 4 with neither you nor your co-op partner dying.
Stranger Than Friction (15) - Master the Propulsion Gel.
Tater Tote (15) - Carry science forward.
Triple Crown (15) - Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each.
Tunnel of Funnel (15) - Master the Excursion Funnel.
Vertically Unchallenged (15) - Master the Repulsion Gel.
White Out (15) - Complete the first Conversion Gel test.
Air Show (20) - Perform 2 aerial gestures before touching the ground in co-op.
Door Prize (20) - Examine all the vitrified test chamber doors.
Drop Box (20) - Place a cube on a button without touching the cube.
Final Transmission (20) - Find the hidden signal in one of the Rat Man's dens.
Iron Grip (20) - Never lose a cube in Chamber 6 of the Mass and Velocity co-op course.
Lunacy (20) - That just happened.
Portal Conservation Society (20) - Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements.
Preservation of Mass (20) - Break the rules in Test Chamber 07.
Rock Portal Scissors (20) - Win 3 co-op games of rock-paper-scissors in a row.
Schrodinger's Catch (20) - Catch a blue-painted box before it touches the ground.
The Part Where He Kills You (20) - This is that part.
Empty Gesture (25) - Drop your co-op partner in goo while they are gesturing by removing the bridge under them.
Four Ring Circus (25) - Enter 4 different portals without touching the ground in co-op.
Narbacular Drop (25) - Place a portal under your co-op partner while they are gesturing.
Party of Three (25) - Find the hidden companion cube in co-op test chamber.
Overclocker (30) - Complete Test Chamber 10 in 70 seconds.
Pit Boss (30) - Show that pit who's boss.
Friends List With Benefits (50) - While playing co-op, hug 3 different people on your friends list.
Professor Portal (75) - After completing co-op, complete Calibration Course online with a friend who hasn’t played before.
Smash TV (75) - Break 11 test chamber monitors.
You Saved Science (100) - Complete all test chambers in all courses of co-op.
