Mar 2, 2011 08:25 GMT  ·  By

Portal 2 has just received its full list of achievements, and speculation is already brewing as one of them seemingly hints at Half Life 2 Episode 3.

Portal 2 will be arriving in April, so the list of 50 achievements that has appeared is not that surprising.

[admark=1]In it, you'll find a lot of amusing challenges and clever names, pertaining both to the single-player campaign as well as the co-operative one, which, according to the achievements, puts a big focus on being creative and mischievous at the same time.

What's more important is that Internet users and Half Life fans are speculating that one achievement, Ship Overboard, which challenges you with finding the 'missing experiment', may hint at the infamous Half Life 2 Episode 3.

That game has been in development for a long time, and Valve continues to refrain from making any type of statement regarding it.

As such, fans have started going through any type of information released by the company in order to search for clues to its existence.

The achievement may hint at the Borealis ship, which, according to Episode 2, may be the key to eliminating the alien Combine from Earth because it was filled by Aperture Laboratories with powerful technology.

Both Portal 1 and 2 take place in the actual labs of the Aperture company, so a connection was rumored for quite some time.

Still, this is all just speculation, at the moment at least, so until we can see for ourselves in Portal 2, feel free to skim the list of 50 achievements that will be in the game.

Pit Boss (30 points) - Show that pit who's boss Preservation of Mass (20 points) - Break the rules in Test Chamber 07 Pturretdactyl (5 points) - Use an Aerial Faith Plate to launch a turret Lunacy (20 points) - That just happened Drop Box (20 points) - Place a cube on a button without touching the cube Overclocker (30 points) - Complete Test Chamber 10 in 70 seconds No Hard Feelings (10 points) - Save a turret from redemption Schrodinger's Catch (20 points) - Catch a blue-painted box before it touches the ground Ship Overboard (10 points) - Discover the missing experiment Final Transmission (20 points) - Find the hidden signal in one of the Rat Man's dens Good Listener (5 points) - Take GLaDOS' escape advice Scanned Alone (5 points) - Stand in a defective turret detector The Part Where He Kills You (20 points) - This is that part Bridge Over Troubling Water (10 points) - Complete the first Hard Light Bridge test SaBOTour (10 points) - Make a break for it Stalemate Associate (15 points) - Press the button! Wake Up Call (5 points) - Survive the manual override You Monster (5 points) - Reunite with GLaDOS Undiscouraged (10 points) - Complete the first Thermal Discouragement Beam test White Out (15 points) - Complete the first Conversion Gel test Tunnel of Funnel (15 points) - Master the Excursion Funnel Dual Pit Experiment (15 points) - Do the same test twice Tater Tote (15 points) - Carry science forward Vertically Unchallenged (15 points) - Master the Repulsion Gel Stranger Than Friction (15 points) - Master the Propulsion Gel Professor Portal (75 points) - After completing co-op, complete Calibration Course online with a friend who hasn’t played before Air Show (20 points) - Perform 2 aerial gestures before touching the ground in co-op Portal Conservation Society (20 points) - Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements Empty Gesture (25 points) - Drop your co-op partner in goo while they are gesturing by removing the bridge under them Party of Three (25 points) - Find the hidden companion cube in co-op test chamber Narbacular Drop (25 points) - Place a portal under your co-op partner while they are gesturing Asking for Trouble (10 points) - Taunt GLaDOS in front of a camera in each of the five co-op courses Rock Portal Scissors (20 points) - Win 3 co-op games of rock-paper-scissors in a row Friends List With Benefits (50 points) - While playing co-op, hug 3 different people on your friends list Four Ring Circus (25 points) -Enter 4 different portals without touching the ground in co-op Triple Crown (15 points) - Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each Still Alive (15 points) - Complete Course 4 with neither you nor your co-op partner dying Can't Touch This (10 points) - Dance in front of a turret blocked by a hard light bridge in co-op Smash TV (75 points) - Break 11 test chamber monitors High Five (5 points) - Celebrate your cooperative calibration success Team Building (10 points) - Complete all test chambers in the Team Building co-op course Door Prize (20 points) - Examine all the vitrified test chamber doors Portrait of a Lady (10 points) - Find a hidden portrait You Made Your Point (10 points) - Refuse to solve the first test in Chapter 8 You Saved Science (100 points) - Complete all test chambers in all courses of co-op Iron Grip (20 points) - Never lose a cube in Chamber 6 of the Mass and Velocity co-op course Gesticul-8 (15 points) - Perform all 8 gestures of your own volition in co-op Confidence Building (10 points) - Complete all test chambers in the Mass and Velocity co-op course Bridge Building (15 points) - Complete all test chambers in the Hard-Light Surfaces co-op course Obstacle Building (15 points) - Complete all test chambers in the Excursion Funnels co-op course Portal 2 is set to appear for the PC, PlayStation 3 and Xbox 360 on April 18, in North America, and April 22, in Europe.