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DoorSystemCircle Allows opening and closing of doors and airlocks.

Overview[]

  • Functioning Door System allows remote operation (opening and closing) of doors. This has many uses:
    • Venting oxygen from a room to suffocate fires.
    • Equalizing oxygen levels between rooms.
    • Assisting in dealing with boarders. Boarders can be separated, stalled, or manipulated to change their direction and effectively suffocated. (requires blast doors)
  • Blast doors (level 2+ doors system) impede intruders movement.
  • Closed doors with available Door System slow down fires spreading between rooms. (see data and data 2)
    • Blast doors significantly slow down the fires spreading to other rooms.
  • Hacked doors are equivalent to opened doors (or lack of the Doors System).
    • Boarders move freely through hacked doors.
    • Fires spread at the fastest pace from such rooms to other rooms.
  • Doors can be opened in specific patterns to slow down the oxygen loss in a room and preserve as much overall oxygen on the ship as possible in case of a (single) breach, while having only level 1 O2 system: open only a single door in a breached room and make the longest route of opened rooms with oxygen to the breached room via the opened door.
    • By opening doors in such patterns, multiple breaches can be countered with level 2 O2 system.
  • To vent a specific room on a ship in the fastest possible way, open all available airlocks or rooms with breaches (or Lanius) that lead to the room that needs venting. Turn off the O2 system to quicken the process.
  • Manning the Door System console makes the system work 1 level above its current upgrade level.
    • The maximum (4th) system level can be achieved only by manning the system.
  • Disabled, broken or lack of the Door System - indicated by the doors having a red-orange color - prevents remote operation (manual or on-demand, via special "open/close all doors on the ship" function) of all doors, but still allows crew and boarders movement through them.
    • Ionizing effect completely disables remote operation of the Door System, regardless of the system level and the ion damage amount.
    • If the system is disabled in the event, doors can be momentarily operated if the game was manually paused before the flavor-text screen disappears.
  • Door strength depends on the Door System level and the game difficulty. (see the door strength table)
  • Upgraded Door System can be used as a blue option in some events.
  • Can be upgraded in Specialty work on your ship event.

Door strength[]

Fires spread effortlessly through open doors. Blast Doors substantially impede fire spread. (see data and data 2)

Enemy boarders will break down blast doors. They make about one attack per second with slightly randomized timing. Doors have a set amount of health which is restored after making an FTL jump. When broken, a door remains stuck open for 7 seconds, after which its health is reset and you can control it again (you can issue the "Close All Doors" command - the default keyboard shortcut is set to "X" - to force the door to close automatically as soon as it becomes operable). Broken doors on enemy ships always stay open, except for when a breach occurs in the room and also when a breach gets sealed (the doors system must be functional).

When the Door System is actively hacked, all doors temporarily become enemy level 3 (improved blast) doors; the doors health is reset with each hack cycle (this doesn't apply to the doors of the hacked Door System).

Lockdown effect of the Crystal crew special power ability and Crystal Lockdown Bomb restores the doors health and also protects it while the crystal coating lasts. While a room is on lockdown, it is impossible to manually open or close the doors (this doesn't apply to the airlocks which always stay operational). Nevertheless, it is possible to override this limitation by issuing the "Open All Doors" command - the default keyboard shortcut is set to "Z" - to open all doors and then manually close the ones that need to be closed (the command to "Close All Doors" is set to the keyboard shortcut "X" by default). Note that if a room is locked down before a hacking drone attaches to the system, then the room's doors take only 4 hits to be broken after the coating disappears (instead of the regular 10 hits on Hard difficulty), however, another lockdown will reset the doors health appropriately (and also protect their health while the coating lasts).

The number of hits required to break down doors varies by the system level and the difficulty setting. Both the player and the enemy doors are weaker on higher difficulties.

Hits required to break a door
System
level
Game difficulty setting
Hard Normal Easy
2 6 8 12
3 10 12 16
4 15 18 20

If the Door System level changes while a door is being attacked, the dealt damage is remembered and the current maximum and the leftover door strength changes proportionally (e.g. on Hard difficulty level 3 provides 66% door strength increase over level 2). Some examples on Hard difficulty:

  • Level 2 doors already hit 5 times will require only 1 hit to be broken if the Door system level is increased by manning
  • Level 2 doors already hit 4 times will require 3 hits to be broken if the Door system level is increased by manning
  • Level 3 doors already hit 6 times will still require 1 hit if the Door system level is decreased to level 2

Tips & guides[]

System upgrades[]

Level Cost Doors Effect
1 60* Ftlgame-scrap Normal Doors Remote opening/closing of doors
2 35 Ftlgame-scrap Blast Doors Significantly slows down fires spread between rooms, impedes boarders movement
3 50 Ftlgame-scrap Improved Blast Doors Significantly slows down fires spread between rooms, impedes boarders movement more
4 N/A [1] Super Blast Doors Significantly slows down fires spread between rooms, impedes boarders movement even more
  1. Only available when level 3 Door System is manned.
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