Submachine 5

That code 717 is wrong; 747 works there.

The codes to open the hatch and retrieve the third stone are in Room 02 and are displayed in green on three separate screens. However, for them to appear, you must leave the light on in Room 01, where the tub of acid is located. For those who don’t understand the numbered room labels, here’s a quick summary. We have key fob No. 1 and key fob No. 2. The cabinet where they are inserted has two empty slots labeled 00. If we insert key fob No. 2 into the first slot, we get room 20 :-)

Have you noticed that when you turn on that device with the three lightning bolts on it, it sounds like a lightsaber?

To turn on the light, go to 5-5-2—there's an electrical box in that cave. Click on it and it'll open on its own. Next to the trash can, there's some kind of device—click on the little levers next to a ball :D. Click on both of them, then click on the ball :D, and it’ll plug itself into the outlet.

arti40: That "device with the three lightning bolts on it"—that's a teleporter.

awesome game

Well, just when I was about to win, I had to go to sleep.

This game is so cool! I beat it without a walkthrough, and it took me about 3 hours, but it's probably the best game I've played here :)

It's a great game, but it's impossible without the instructions... You quickly get stuck and then lose your patience. In my opinion, those who claim they managed it without the instructions must have played it for two days.

Complete Walkthrough—Part 2: Now go to 12; it’s kind of a loop. In one room, there’s a small cabinet; open it by turning those rings as long as necessary. Don’t forget to check the cabinet—take the metal box from it and the unsecured light bulb from one of the hallways. Then go to area 21; at the top of the room, flip both switches—this will move the grate that’s beneath you. In the lower left corner, connect the second light bulb and proceed further into the room. Now you have a choice: you can either try to find the correct combination of symbols on your own, or, if that option seems too time-consuming, you can go to Room 10 to plug in the lightbulb. In the adjacent room, click on the inscription on the bathtub—you can immediately drop the metal box into it (it will dissolve, leaving a crystal behind). Use the fire extinguisher to open the bathtub faucet and drain it. Then go to room 02 and head to the end of the hallway; the symbols you’ve earned will be written down on a piece of paper. Click slightly to the left at the base of the large pipe in the middle of the room, pick up the secret, turn around, and you can return to room 21 to enter the code there. Climb down and use the orange object (lead casting) to open the space under the statue, where another crystal lies. Continue to room 20; turning the wheel broke open the bricked-up door—the last crystal is here. Then go left, and the last secret is on top of the chair. Return to the transformer and enter the code labeled “CORRIDOR.” Go right, open the door, and place the crystals into the wheel on the wall. It will close. Click the lever on the workbench; a square will slide out from the opposite wall, allowing you to exit. About halfway through, you’ll see a sign mentioning the word “secret”—click it. You’ll find yourself in the next area: SECRET LOCATION. You can go left to return to the menu or the starting area—which will be exactly as you left it—or you can painstakingly insert the secrets into the holes next to the bars to gradually review what you’ve been through—probably the hardest challenges or something like that. And that’s actually the end of the game.