Ingue Ferroque is the twenty-seventh and last level in Marathon. It is the third and final level of Rebellion, the sixth and final chapter of the game. The objective here is to reach the final terminal.
There is a 3x shield recharger in the starting room. A 2x shield recharger is available in the maze. There is a pattern buffer in the starting room, however it is only available after the player has hit a switch that's hidden in a secret area later in the level.
Use the 3x shield recharger in the starting room if you need it. Drop down into the room to the north. This is the innermost ring-shaped room, which actually leads all the way around the starting room.
Kill all the Pfhor; the Compilers will help you out. There are two switches high up on the west and east walls you need to hit to raise some stairs at the south end of the room. A short corridor will take you to the outer ring.
Drop down into the outer ring, and clear the room. There are again two switches up on the west and east walls; each raises a flat platform on the north side of the ring. Stand on the platforms, then hit the buttons. You'll actually only have to hit the west switch if you stand in the correct position. You can also hit the switches first, then grenade jump up the platforms.
You'll find yourself in a maze. If you follow the left hand wall you'll find a 2x shield recharger. Keep following that wall and you'll eventually reach a trio of teleporters. Enter any teleporter to be sent to the third and final ring, in between the two other rings.
Clear the ring of enemies. There are two buttons up on the inner eastern and western walls. Hit them; the floor at the south end of the ring will drop down, revealing the entrance to a short lava-filled maze. In the maze, you'll be fired upon by enemies standing on side platforms. You'll have to be quick; drop down into the lava and go right. Follow the corridor, running past a platform full of enemies, then take a left hand turn, following the lava river back to the starting room. Don't fall down but jump across to an alcove. Turn around, and you'll see another alcove you can jump towards that contains the final terminal in the game. Congratulations, you have finished Marathon!
This level contains a secret route you can take. At the trio of teleporters at the end of the maze, face a teleporter. Don't enter it, but press your action key; the rear wall will slide open, revealing a hidden passage. Run into the passage before you get teleported. You'll find yourself in another maze with confusing, overlapping and self-intersecting corridors that couldn't possibly exist in real 3D space (Bungie refers to this as "5D space"). Somewhere inside this maze you'll find a switch; hit it to reveal a pattern buffer back in the first room of the level.
The easternmost wall in the maze hides a secret teleporter. It'll send you to an ammo cache with another teleporter. That teleporter in turn will send you to a pit of lava in the middle of a room, surrounded by tons of enemies. If you manage to survive this ordeal, you can read the secret Bungie credit terminal here. A teleporter in this room will send you back to the trio of teleporters at the end of the regular maze.
The first terminal is a message from Durandal. He tells you that this is the last time you will meet, and that you may only meet him because Leela does not know of the maintenance terminal you are accessing. He tells you that the S'pht have helped him capture the Pfhor ship, and that he is going to see the galaxy, and to see if Beta Lyra is as beautiful if everyone insists. He will send you a postcard from the galactic core, and closes with love and kisses.
The second terminal is another "out-of-character" message from Bungie with the game's credits.
The third and final terminal is a message from Leela. She tells you that the Pfhor attack is falling apart all over the ship, and that the nine Mjolnir Mark IV Cyborgs on the colony are helping to end the invasion there as well. She doesn't believe that Durandal brought the cyborgs onboard, but she fears that they were brought on as a result of the poltical nature of the Sol system in the 24th century. She then tells you that the Pfhor ship left the system, and that she believes Durandal is in control, which was confirmed in the first terminal.
- The music for this level is a song titled Splash (Marathon). It is track #13.
- When this map is opened in a map editor, a written message can be found outside the bounds of the level. It reads, "JAy rokz greg". "JAy" could refer to Jason Jones, who made this level; "greg" refers to Greg Kirkpatrick.
- Jason Jones made a grammatical mistake when naming this level. As he later realized, the level should have been named "Ignie Ferroque", which is Latin for "By Fire and Sword".
Marathon - Level 26: Ingue Ferroque