Where the code is used
The basement code is entered on a keypad lock inside the hidden room that opens after you pull all three Basement levers. Solving that keypad is the final puzzle step that frees the alien and clears the blocking lasers. You reach the keypad by completing the crystals and picture puzzles first, because the three challenges must be solved in sequence. The keypad sits across from the picture rotation puzzle in the secret room you unlocked.
Only after the keypad is solved can you use the key on the trapdoor and escape the Basement for the Chapter 2 badge. The code is therefore the last numerical gate before freedom in the whole chapter experience. If the keypad rejects your entry, the escape door stays sealed until you find the right paper. The step is simple in concept but strict about using your own session's number.
Because the code is generated per session, the same four digits never travel between players or between your own repeat runs. The exact digits are pending confirmation until you read them off the paper in your current game. Treat any number a friend gives you as useless for your own keypad today. The only reliable answer is the one printed on your own floor sheet.
How to find the code
The four digit code is printed on papers scattered across the floor of the secret room for you to discover. You flip them one by one until one shows the digits that open the lock for your session. Gameplay footage shows players flipping many papers before reaching the one that displays the working code. The code sheet is mixed among decoy papers that show an X or other marks instead of numbers.
Because the papers are randomized, there is no fixed order to search, but sweeping the whole floor methodically avoids missing the sheet. Pick up and inspect each paper until the correct sheet appears, then walk to the keypad to test it. The location of the correct paper is pending confirmation and varies by session for every player. A calm full sweep beats frantic guessing when the timer in your head starts ticking.
If a number fails, do not assume the game is broken, because you likely read a decoy or a different session's clip. Return to the papers and continue flipping until the correct sheet finally appears on the floor. Keep the keypad in view so you can test a found number immediately without losing your place. The hunt for the sheet is the real puzzle, not the typing of the digits.
Why the code changes
The basement code is generated per session, which is why different videos show completely different four digit answers for the same keypad. A number that worked for one player will not work for another run on a different server. This design means any specific code copied from a guide or clip is only that creator's observation for their game. Treating a video number as universal is the most common reason players get stuck here.
The only reliable answer for your Search For The Needle basement code is the sheet you find in your current session. The exact digits are pending confirmation until you read them in game with your own eyes. Developers use per session codes to stop players from skipping the discovery part of the puzzle. Embrace the search and the keypad stops feeling like an unfair wall.
If you see a clip promising a permanent basement code, close it, because that claim is misleading and unverified by any source. No official data suggests a fixed keypad answer exists for this experience at any time. The randomized design is confirmed by the spread of different codes across many creator videos. Your session's number is the only one that matters for your escape today.
Related puzzles
The keypad is the third of three Basement puzzles, after the crystals count and the picture rotation challenge. All three must be solved in order or the sequence can soft lock until a reset happens in the room. The crystals puzzle also uses per session numbers, because the colored crystal counts differ each run you play. The picture puzzle is visual and follows the in room reference instead of a typed code.
Master the full set rather than only the keypad, because escaping requires all three plus the key from the haystack. Each numerical answer should be treated as session specific and rechecked live before you commit it. The keypad is the most frustrating step only when players import a wrong number from outside. Solve the crystals and picture first, then give the keypad your full attention.
Because every numerical answer in the Basement is session specific, plan to solve each in game rather than from memory. The crystal counts for any run are pending confirmation until you observe them live on the walls. The keypad digits for any run are pending confirmation until you read your own floor paper. Together the three puzzles form a coherent escape that rewards observation over copying.
Tips to avoid dead ends
Flip every paper you see instead of stopping at the first interesting mark, because decoys can look like a code at a glance. Keep the keypad in view so you can test a found number immediately without walking back across the room. If a number fails, recheck that you typed four digits and not three by mistake during the panic. A calm re flip usually finds the real sheet that was missed on the first pass.
Remember that the basement code is one part of a larger escape, so finish the levers and the other two puzzles first. The final digit string for any run remains pending confirmation until observed on your own floor paper. Server lag can make papers feel unresponsive, so wait a beat before assuming a flip did nothing. Patience here is the difference between a quick escape and a long frustrated loop.
If you truly cannot find the sheet, reset the room and repeat the lever sequence to refresh the papers cleanly. The randomized layout means a fresh session often presents the code sheet in a new and easier spot. Avoid guides that promise a fixed basement code, because that promise contradicts the per session design. Your own floor is the only source of truth for this particular keypad.