Z3M3:Permanent Grey Doors

This is a list of doors in Super Metroid that are always grey and can never be opened by the player. Their existence crates a one-way path.

• Climb: Top-right door (connects to top door of Crateria Super Room
• Bowling Alley: Mid-left door (connects to West Ocean)
  • This door is actually blue before Phantoon dies, but that's probably not a factor for the logic
• West Ocean: door to Gravity Suit Room
• Green Brinstar Main Shaft: Door to Etecoon Room

A few additional doors are also permanently grey, but are part of Tourian or the subsequent escape and are likely not important.

• Climb: Bottom left door
• Dust Torizo Room: Right door
• Big Boy Room: Right door