World Engine Program Mission Full Walkthrough and Details | StarRupture

[1] Go to the World Engine and find the entrance to learn that you need a Power Cell to unlock it.
[2] Craft a Power Cell.
[3] Return to the World Engine entrance and unlock it by placing the Power Cell in the Entry Terminal.
[4] Get to the Control Center Room (also known as Room A1) at Level 0 - Main Engine.
[5] Head to the Backup Generator room at Level -2 - Logistics.
[6] Turn on the Backup Generator.
[7] Head back to Level 0 - Main Engine and find the Tech Level Access Card near a crushed corpse by the Control Center Room entrance.
[8] Head into the Control Center Room, which should now be accessible using the Backup Generator and the Tech Level Access Card to unlock the door.
[9] Interact with the Forgotten Engine Control Station to learn that you need a Main Engine Central Core.
[10] Head to Level 2 - Tech Stations and make your way to the Tech Lab Room.
[11] Craft the Main Engine Central Core in the Forgotten Engine Item Printer inside the Tech Lab Room. It needs 3 Stabilizers, 3 Generators, 4 Accumulators, and 8 Electromagnetic Coils.
[12] Head back to the Forgotten Engine Control Station and place the Main Engine Central Core in it.
[13] Activate the Forgotten Engine Program by interacting with the Forgotten Engine Control Station again.
[14] Defend yourself and the Forgotten Engine Control Station until it finishes powering up.

・All materials needed to craft the Main Engine Central Core can be found inside the World Engine.
・Use your heal and grenade ability as much as you can, they will always recharge after killing a ton of aliens.
・Bring as much food and ammo as you can.