Z3M3:Absolute One-Way Paths
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This is a list of paths in Super Metroid that can only be taken in one direction, regardless of items. This ignores permanent grey doors. In the context of a door randomizer where helping players avoid softlocking is important, one-way paths complicate matters for the logic.
One-way traversal through rooms
- Crateria Super Room
- Bottom door to top door
- Green Pirates Shaft
- Top door to any of the following
- Mid-right door
- Bottom left door
- Bottom right door
- Top door to any of the following
- West Ocean
- All paths with a combination of
- Origin door among the following
- Top right door
- Lower top right door (connected to top left door of Bowling Alley
- Door to Bowling Alley Path
- End door among the following
- Left door
- Entrance to Wrecked Ship
- Door to Gravity Suit Room (assuming it's not grey)
- Origin door among the following
- All paths with a combination of
- Green Brinstar Main Shaft / Etecoon Room (technically the same room)
- All paths with a combination of
- Origin door among the following
- Top Etecoon room door
- Bottom Etecoon room door
- End door among the following
- Left-most door to Etecoon Energy Tank Room
- Door to Etecoon Room (assuming it's not grey)
- Door to Dachora Room
- Door to Green Brinstar Fireflea Room
- Door to Save room
- Door to Brinstar Pre-Map Room
- Door to Early Supers Room
- Elevator to Crateria
- Origin door among the following
- All paths with a combination of
- Etecoon Energy Tank Room
- Top left door or top right door TO bottom left door or bottom right door
- Big Pink
- Door from bottom of Pink Brinstar Power Bomb Room, to any other door in the room
- Pink Brinstar Power Bomb Room
- Top door to bottom door
- Spore Spawn Room
- Bottom door to top door
- Explanation: It's not possible to kill Spore Spawn when coming in from the top door, so the first traversal is absolutely one-way
- Bottom door to top door
- Spore Spawn Super Room
- Top door to bottom door
- Single Chamber
- Door from Three Musketeers' Room to any other door in the room
- Ice Beam Gate Room
- Door from Ice Beam Tutorial Room to any other room
- Crocomire Speedway
- Left-most door to any other door
- Note: Not an absolute one-way path in vanilla, but depends on adjacent rooms to be possible. Can be absolute one-way with randomized doors
- Left-most door to any other door
- Crocomire's Room
- Top door to left door
- Explanation: It's not possible to kill Crocomire when coming in from the left door, so the first traversal is absolutely one-way
- Top door to left door
- Mickey Mouse Room
- Right door to left door
- Lower Norfair Spring Ball Maze Room
- From left door or door from Lower Norfair Fireflea Room to top right door
- Lower Norfair Escape Power Bomb Room
- Top door to left door
- Acid Statue Room
- Top door to bottom door
- Explanation: It can be traversed backwards, but not the first time
- Top door to bottom door
- Golden Torizo's Room
- Left door to right door
- Bowling Alley
- Door from West Ocean corridor to Gravity Suit Room door
- Pants Room
- Bottom left door or center left door TO right door or center right door
- Botwoon Quicksand Room
- Top left or top right TO bottom left or bottom right (there is a morph passage in the middle)
- West Aqueduct Quicksand Room
- Top to bottom
- East Aqueduct Quicksand Room
- Top to bottom
- Plasma Beach Quicksand Room
- Top to bottom
- East Sand Hole
- Top to bottom
- West Sand Hole
- Top to bottom
One-way traversal through rooms unless a reverse GGG is done
- East Tunnel
- Top right door to left tunnel door or right tunnel door
- Caterpillar Room
- Exit from Red Fish Room to any other door or elevator in the room
- Crocomire Escape
- Right door to left door
One-way traversal through rooms unless a regular GGG is done
- Fast Ripper Room
- Left door to right door
- Crab Tunnel
- Left door to right door
- Grapple Tutorial Room 3
- Left door to right door
One-way exits out of a room via quicksand
- Botwoon Energy Tank Room
- Left sand exit
- Right sand exit
- Botwoon Quicksand Room
- Left sand exit
- Right sand exit
- Aqueduct
- Left sand exit
- Right sand exit
- West Aqueduct Quicksand Room
- Only sand exit
- East Aqueduct Quicksand Room
- Only sand exit
- West Sand Hole
- Only sand exit
- East Sand Hole
- Only sand exit
- Bug Sand Hole
- Only sand exit
One-way entrances into a room via quicksand
- Botwoon Quicksand Room
- Left sand entrance
- Right sand entrance
- Below Botwoon Energy Tank
- Left sand entrance
- Right sand entrance
- West Aqueduct Quicksand Room
- Only sand entrance
- East Aqueduct Quicksand Room
- Only sand entrance
- West Sand Hole
- Only sand entrance
- East Sand Hole
- Only sand entrance
- West Sand Hall
- Only sand entrance
- East Sand Hall
- Only sand entrance
- Butterfly Room
- Only sand entrance