Portal Reloaded: How to Beat Chamber 25 Puzzle

Portal Reloaded: Chamber 25 Guide

Portal Reloaded is an excellent fan-made mod that’s completely free for owners of Portal 2. This new series of tests introduces a third green portal that allows test subjects to travel between the present and future in a collection of original puzzles. It’s difficult to improve on a series that’s already amazing, but the mod makers managed to bring players to a whole new dimension of thinking.

The final puzzle before the finale is a test of everything the player has learned up until this point. Chamber 25 has a laser, excursion tunnel, light bridge, cubes, and four separate laser gates that need to be shut down so the player can pass through to the end. Here’s a guide that explains everything that needs to be done to solve this mind-bending portal puzzle.

Solving Chamber 25 in Portal Reloaded

To begin, press the button on the left side of the room to drop a cube into the excursion funnel and then fire one portal where the funnel ends and another on the ground so the player can grab the cube. This special cube can redirect thermal discouragement beams or the red lasers. Fire a new portal into the portal surface near the ceiling where the laser is firing and then another one on the surface right of the stairs. Then, use the cube to redirect the laser into the reticle next to the symbol with the two dice. This will disable the second laser gate, but what about the first? Another laser cube is needed, so head to the future and grab the future version of the same cube and bring it back to the present. Create a new portal in the area underneath the laser gates and use the future cube to redirect the laser into the reticle with the number one dice block. It’s important that it’s done out of order like this, because the moment the present cube is rearranged, the future one will vanish. Now that the first gate is open, head there and create a new portal so the laser goes through the present cube once again, thus opening the second gate.

In between the second and third gate, there’s a surface only for time portals that are opened by pressing a button. Create it, then get ready for some fast-paced portal placing. This section can be difficult, so feel free to create a save file before attempting this part of the puzzle. Start by shooting one portal at the end surface of the excursion funnel, then another underneath the cube that was just used to redirect the laser. This will cause it to gradually float to the ceiling where the laser is. The player needs to get the cube to stop rising so it stays in place and redirects the laser into a reticle, so go to the future and fire a new portal at the light bridge there. Shoot the ‘receiving end’ portal on the surface in the upper left corner of the wall, and then return to the present. Finish by creating a new time portal on the upper right side of the room, so the light bridge from the future enters the present and prevents the cube from rising any higher. It’s done in this order because changing the portals in the past will change where they are in the future, but not the other way around. After passing through the third gate, remove the time portal so the cube keeps floating and presses against the big button on the ceiling. This opens the fourth gate.

And now for the final portion of the puzzle, the door to the exit. To open it, players need to have a cube on the previous ceiling button, as well as another one next to the new time portal surface. Use this to go to the future, where the future cube will fall from the ceiling because there’s no longer an excursion funnel to suspend it in the air. Use this falling momentum to one’s advantage by creating a new portal on the opposite side of the room from the player so the future cube can fall through the portal below it and then launch to the other side. Then, take it to the present, place it on the button, and chamber 25 is finished.

Portal Reloaded, the mod for Portal 2, is available on PC.

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