Okay, once you solved Puzzle 0602 and 0603 in The Entropy Centre (and if you need assistance, I’ve got a full guide here), you’re going to need to complete Puzzle 0604 before you can complete Act 6 of the game. Thankfully, I’ve got you covered with a quick walkthrough.
When you first enter the room, you’re going to want to walk up the staircase all the way to the very top. Note that it does curve around into a dark section once it hits the Time-Gate — instead of walking through the Time-Gate, you want to turn 180 degrees to find the next section of the staircase.
At the top of this staircase is a bridge cube, which you’re going to need to use in a few different places. That Time-Gate is going to be a little bit of a problem, but don’t worry because you can actually disable it with the bridge cube. But first, you want to place the bridge cube on the button up here on top of the level.
Next up is the trickiest section of this puzzle — and the part that I think really trips people up — because you have to actually pass the bridge cube down to your future self. You want to make sure you drop the cube in a position where you can catch it from the hallway below where you’re standing. Dropping it forward from where the purple square is painted on the floor is a good strategy.
Now, drop down to the bottom of the room and place the bridge cube on the button that disables the Time-Gate. Now you can pass through the Time-Gate without resetting your gun’s memory, then rewind the cube to where you can grab it. This is actually a lot easier than it sounds, because when you stop rewinding the cube, it just kind of hovers there, which gives you plenty of time to grab it.
Now you can create a bridge over to the last section of the puzzle room. Once you’ve crossed the bridge, you can rewind the bridge cube back to the very beginning, where it was on that first button. This opens the door to the exit.
Okay, so this puzzle is kind of hard to describe in words, so all of that might sound kind of vague. I’m just going to show you a video of my Puzzle 0604 walkthrough:
Note that after this, you’re going to have to race up a collapsing staircase while water is rising below you. If the water catches up to you, or if you fall into the water, you will die and have to restart the silo section. It’s really not difficult, though. I didn’t get a video of it, but just keep rewinding any part of the scaffold that collapses. There is one part where you’re going to need to use a beam to cross over a pit, but that beam has arrows on it, making it really easy to line it up with your path.
Once you’ve completed the silo section, you can get into an elevator that will take you to another set of puzzles. That will bring Act 6 to a close.
And that’s how you solve Puzzle 0604 to complete Act 6 of The Entropy Centre. If you want to continue these walkthroughs, check out my next guide here.
