Chapter 5: Infiltration - Terminal Escape Room Wiki
Breach the abandoned HQ: keycards, ordered sequences, and the infiltration route out.
Overview
Chapter 5: Infiltration takes you into the abandoned headquarters. Instead of open testing, you hunt keycards and enter ordered sequences to move through secured rooms.
From Lab to Lockdown
After the lab, Infiltration trades experiments for access control. You need Keycard 3, then Keycard 4, each gated behind its own small puzzle.
The mode you choose changes difficulty, but the keycard chain is the same core loop - find, solve, advance.
Infiltration Route
Collect access in order, then breach the exit.
Find Keycard 3
Solve the testing-room puzzle to earn the first keycard.
Reach Keycard 4
Use card 3 to open the next zone and solve for card 4.
Enter sequences
Input the ordered codes the secured doors expect.
Breach and leave
Open the final lock and infiltrate your way out.
Keycard Chain
The access path through the HQ.
| Card | From | Opens |
|---|---|---|
| Keycard 3 | Testing room | Next zone |
| Keycard 4 | Mid zone | Secure door |
| Final code | Door panel | Exit |
| Escape | Last lock | Out |
Infiltration Skills
What this chapter needs.
Keycards
Access is earned, not found.
Order
Sequences must match the panel.
Search
Cards hide behind small puzzles.
Breach
Chain access to the exit.
Stuck on a Keycard?
Unblock the chain.
- Re-check the testing room for the Keycard 3 puzzle.
- Confirm the door sequence order from its panel.
- Spend a Hint on the stuck card puzzle.
- Replay Beginner Mode to learn the chain safely.
The Final Chapter
Infiltration leads to Chapter 6: Revolution, the climax where the Leisterez mystery resolves - and where the secret ending can appear.
Frequently Asked Questions
How do I get Keycard 3?
Solve the testing-room puzzle in Chapter 5; the reward is Keycard 3, which opens the next secured zone.
Where is Keycard 4?
Past the zone unlocked by card 3, solve the mid-zone puzzle to earn Keycard 4 for the secure door.
Why will not the door open?
The sequence order is likely wrong. Read the door panel for the intended order, not just the digits.
Is Chapter 5 stealthy?
It plays like infiltration - find keycards and enter ordered codes - more methodical than the open lab testing of Chapter 4.
Does Beginner Mode change the chain?
It reworks the puzzles but keeps the keycard chain, so the route you learn transfers to Standard.
What comes after?
Chapter 6: Revolution, the finale that resolves the story and can trigger the secret ending.
Any codes here?
Yes - ordered door sequences; if stuck, the codes page Hints can nudge a stalled panel.