I haven't made any changes to it so if it hasn't worked before then it will likely doesn't work now as well. Send me a savegame + instructions then.
Spoilers below, obviously.
In Chamber 2, find the shop and buy the "Gnawed Key" from the display case.
I haven't tried it, but I wouldn't anticipate any problems with using the elevator on the right side of the Breach to skip to Chamber 2.
In chamber 3, look for a trapdoor in the floor. It will be faded, but there are often rats in the same room.
Walk back and forth over the trap door for a little while and it will become usable, which requires 1 key.
Through the trapdoor, there is a room with a minecart and a long hallway.
Use the minecart to reach the end of the room, then use a blank to find a secret area.
Go through the broken wall and use another blank when it dead-ends.
You should now see a grate with a golden lock. You can open it if you have the "Gnawed key".
Fall through the grate to reach the secret level. Proceed through the entrance area to a square-shaped pit, then fall in.
You are now in a maze of square rooms with four doors on each room.
Proceed UP, UP, LEFT, DOWN, LEFT, and DOWN.
You should find yourself in a room with a few pickup items on the floor.
Head upwards and you'll find the boss door.
The sequence where there "Infinite Life" function doesn't work is in the boss's third phase (immediately after the phase where he pilots Metal Gear)
Its a minigame in the style of "Punch-out", and you have a health-bar rather than the usual hearts.
I'll keep a tab open to this thread if you need any other instructions of files.
I haven't made any changes to it so if it hasn't worked before then it will likely doesn't work now as well. Send me a savegame + instructions then.
Spoilers below, obviously.
In Chamber 2, find the shop and buy the "Gnawed Key" from the display case.
I haven't tried it, but I wouldn't anticipate any problems with using the elevator on the right side of the Breach to skip to Chamber 2.
In chamber 3, look for a trapdoor in the floor. It will be faded, but there are often rats in the same room.
Walk back and forth over the trap door for a little while and it will become usable, which requires 1 key.
Through the trapdoor, there is a room with a minecart and a long hallway.
Use the minecart to reach the end of the room, then use a blank to find a secret area.
Go through the broken wall and use another blank when it dead-ends.
You should now see a grate with a golden lock. You can open it if you have the "Gnawed key".
Fall through the grate to reach the secret level. Proceed through the entrance area to a square-shaped pit, then fall in.
You are now in a maze of square rooms with four doors on each room.
Proceed UP, UP, LEFT, DOWN, LEFT, and DOWN.
You should find yourself in a room with a few pickup items on the floor.
Head upwards and you'll find the boss door.
The sequence where there "Infinite Life" function doesn't work is in the boss's third phase (immediately after the phase where he pilots Metal Gear)
Its a minigame in the style of "Punch-out", and you have a health-bar rather than the usual hearts.
I'll keep a tab open to this thread if you need any other instructions of files.
Savegame?