Submachine 4: The Lab

Menu sub4

Release date
v1 (SD) April 20th 2007
v1 (HD) June 17th 2014

Submachine 4: The Lab (or Sub4) is the fourth installment of the main Submachine series.


Submachine 4 is a direct continuation of Submachine 3. The player winds up on the roof of the Lab, after being indirectly rescued by Murtaugh from the loop. After receiving instructions from Mur (via the computer), the player begins to teleport around the subnet with the purpose of exploring different locations and solving puzzles. The player finds a number of notes left behind by previous Submachine explorers, each telling of its writer's fate and revealing plot details and puzzle clues.

After completing the game the player receives a message saying he/she has "passed all the tests flawlessly" and can now work at the Lab.

List of locations


HD version

A high definition version of the game was released for sale on June 17, 2014 on This version incorporates the float engine as well as improved graphics and a revised ending. The soundtrack is also included with the purchase of the game.

See also

Submachine 4 Locations
Research base 001 - Second tomb 043 - Ancient section 104 - Statue 452 - Lighthouse digouts 462 - Basement section 529 - Brick room 551 - Annex 596 - Looping traps 690 - Lucky room 728 - Tomb trap 770 - Ship 800
Submachine series
Main series 1: The Basement2: The Lighthouse3: The Loop4: The Lab5: The Root
6: The Edge7: The Core8: The Plan9: The Temple10: The Exit
Side series Ancient AdventureFuture Loop FoundationFLF32 ChambersSubmachine UniverseThe EngineThe Explorers
Other games iSubmachineSketch of Submachine 2Card Game
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