On Persephone[edit]
Exit the Flight Deck, open the cabinet and take another OXYGEN TANK. Attach the ACETYLENE TANK and the OXYGEN TANK to the CUTTING TORCH. Exit the lander and take all the four METAL FRAGMENTS.
Move forward and at the junction of the three branches, take the rightmost and continue forward onto ice formation.
Ignite the CUTTING TORCH and melt the ice formation. Then put it out.
Open the ANTIMATTER BOMB and set it for a short time (eg. some seconds). Arm bomb by pressing the button on the left. Put the ANTIMATTER BOMB in the hole and move out from the canyon as soon as possible. Wait for a bit until it detonates (if it takes too long, press the W key to advance the time).
After the cinematic with the explosion, re-enter the canyon and move through tunnel to cavern.
Cavern[edit]
Put the GAS CARTRIDGE in the PROBE LAUNCHER and attach the WIRE SPOOL to the SEISMIC PROBE, then put it in the LAUNCHER. Shoot it at the bridge and traverse the wire
Turn around and move forward all the way to the back of the northern cavern (consult your map). Go down into pyramidal depression and take the two rods (YELLOW and BLUE).
Then enter the pyramidal depression in the west and the east caverns: Put the YELLOW and then the BLUE CRYSTAL ROD in the square slot each time and take the YELLOW or the BLUE prism.
After you have both prisms, return to the north cavern; put the BLUE PRISM in the square slot and then the YELLOW PRISM in the triangular slot. Ignite your CUTTING TORCH and melt them both.
Now leave and go forward to the pyramidal depression in the southern (Ochre) cavern and take the OCTAGONAL OCHRE BLOCK. Return to the Basin cavern and put the BLOCK in the basin, and then the METAL FRAGMENTS from your ship.
Watch animations, as nano-machines assemble themselves and build a dimensional portal. Since you have no other option, you decide to pass through it.
Future[edit]
You are found on Los Angeles, Earth, about 160 years into the future, after the UN won the war, and humanity lost a war against artificial life forms.
Ignite the CUTTING TORCH And cut the shredded metal. Put it out and open the door with the CROWBAR.
In the next room, take the DISK from the pile. Pull the power switch and the induction override switch. In order to stay in its place, block it by putting the WIRE RING.
Move forwards and put the DISK on the rail, and sit on the disk. You reach the high distant building, where you see the remnants of the war.
Go to the right, approach the tank and open the hatch; enter and go back to the right. Press the switch and then use of crosshairs screen. A ray opens the wall. Exit ant move through the hole.
Now simply follow the robotic insects through the "maze". You can't get lost, and even if you are, just continue to follow them. When you reach the Brain Room, enter either of the two glowing rings.
Cyberspace (?)[edit]
Take the GOBLET and drink from it. Take the KEY that appears and open the door. Move forward and talk to the Life Form. Watch the extensive dialogue that relates to you what happened. It then suggests you follow an experiment.
Jiffys[edit]
Talk to a Jiffy and exhaust the dialogue with it. It's only purpose of existence is to find "the door".
Traverse forward (with the arrow) to 00:10. Talk to a Jiffy and ask about the door. It will tell you the time it appeared and the approximate location.
Go back in time and warn a Jiffy about the door. Advance the time once more, but they lost it again. Talk to one again and you will learn the exact location of the door.
Once more go back and inform a Jiffy about the door coordinates. Advance the time and the Jiffys will leave.
Talk now to the Life Form and accept to transfer your mind back in time. In case you deny, the game will end, since you choose to remain and die there alone.
Lexington[edit]
Your memories are transferred right before the initial battle with the Dharma. However the counter-effects of this experience and somniloquy causes you to be transferred to the Medical Lab, and the officers to suspect you for the UN spy.
Talk with Tran and when the dialogue ends, take the REMOTE CONTROL (try the moment when she is not looking). Use it and set code 911, as you learned earlier from the post-it not.
Exit and wait until you re-perform the HYPE procedure, then reach the Bridge and talk to captain Dayna.
Then you play the final space battle mission against the Dharma. Drone Foxtrot is not available since the captain sent it for scouting, so this mission will be slightly more difficult.
You win the game, and watch the endgame cutscene.