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The sealed level

Threshold Institute · Site record

Name
The sealed level

The sealed level was dug around the containment chamber in year 1, before the buildings above it (T-001). It held the cells and the stores, and after the brute every new corridor on it was dug wide enough for one to be walked through (T-003). After the shade it was lit through the night (T-004, T-005).

From year 11 its own rooms began to turn. The last storeroom of the east wing went dark with all its lamps lit (T-008). The archive pulled a clerk from wall to wall (T-009). The door of the old map room on the south corridor led elsewhere (T-010), the north stores grew longer inside than out (T-011), and the old pump room let no sound out (T-012). The biology lab killed two researchers with cold (T-013), the records room turned upside down (T-014), and the closed canteen replayed the people who had eaten in it (T-015). Tomas Rehn walked every corridor with chalk and a count (T-008), and Director Varga ordered every room measured once a year (T-010).

The first walkers of the surveys were trained here, roped, in the upside-down room (T-014), and what the retrieval runs brought back was tested here (T-034). When the widening failed, Erik Halden took his team down to seal the lower levels, and the doors of the sealed level closed behind them on the fourth day (T-055). The level is abandoned to the warden, which walks its corridors and seals every door it passes (T-055).

The files that name this place in their line on where the threshold was found:

File Found Where found
T-004 Shade Year 4, month 2, day 11 The unlit service tunnels under the sealed level
T-005 Echo Year 5, month 11, day 28 The east corridor of the sealed level
T-008 Dark room Year 11, month 5, day 6 The last storeroom of the sealed level’s east wing
T-010 Elsewhere door Year 14, month 11, day 3 The door of the old map room on the sealed level’s south corridor
T-011 Bigger inside Year 15, month 8, day 2 The stores room on the sealed level’s north side
T-012 Quiet room Year 17, month 1, day 30 The old pump room of the sealed level
T-013 Cold room Year 18, month 12, day 5 The biology lab of the sealed level
T-015 Replay room Year 21, month 10, day 1 The old canteen of the sealed level, closed since year 20
T-055 Warden Year 48, month 2, day 9 The Institute’s sealed level, on the camera of its anteroom

The files whose containment procedures name this place, to hold a threshold here, to keep one away, or as a rule for the place:

File Class Found
T-001 The rift Class III Year 1, month 1, day 1
T-002 Rift stalker Class II Year 1, month 4, day 17
T-003 Rift brute Class II Year 2, month 9, day 3
T-004 Shade Class II Year 4, month 2, day 11
T-005 Echo Class II Year 5, month 11, day 28
T-008 Dark room Class I Year 11, month 5, day 6
T-010 Elsewhere door Class I Year 14, month 11, day 3
T-012 Quiet room Class I Year 17, month 1, day 30
T-015 Replay room Class I Year 21, month 10, day 1
T-026 Trader Class I Year 28, month 9, day 6
T-031 Hollow Class II Year 32, month 9, day 30
T-034 Pale Lantern Class I Year 34, month 3, day 11
T-038 Tomorrow Radio Class I Year 36, month 10, day 5
T-042 Endless Battery Class I Year 40, month 8, day 30
T-043 Alien skitter Class II Year 41, month 3, day 14
T-045 Burrower Class II Year 42, month 7, day 2
T-049 Toxic wolf Class II Year 45, month 5, day 8
T-055 Warden Class II Year 48, month 2, day 9

The last column says where in each file.

Part III: Going through (the places and creatures)

File Found Where named
T-021 Upward rain Year 25, month 10, day 3 Addendum T-021-2
T-023 Listening field Year 26, month 11, day 2 Addendum T-023-2
T-025 The copied camp Year 28, month 1, day 19 Addendum T-025-2
T-027 Statue Year 29, month 3, day 27 Addendum T-027-3
T-029 Choir Year 30, month 7, day 15 Addendum T-029-2
T-030 Clockwork Year 31, month 4, day 2 Addendum T-030-2

Part III: Going through (the objects)

File Found Where named
T-035 Still Watch Year 34, month 9, day 2 Addendum T-035-B
T-037 Rewind Clock Year 36, month 1, day 27 Addendum T-037-C

Part IV: The planet and the pollution

File Found Where named
T-046 Drifter Year 43, month 1, day 9 Addendum T-046-1

Part VI: After the fall

File Found Where named
T-056 Toxic mutant Year 48, month 9, day 30 Addendum T-056-2

The journal names this place in:

Generated on 2026-11-13 from the game at commit b8361f1, rebuilt with every release (a release's name ends in its commit, e.g. build-…-b8361f1).

Every number on this wiki is read from the game's data files, and every icon is the game's own pixel art.

Credits: who made the game, and every creator whose sounds it uses.