The Bomb Codes are a mechanic of Zero Escape: Virtue's Last Reward. However, they are only relevant in the timelines behind the Cyan Chromatic Door, as they are not applied in any other timeline. Sigma Klim must jump from other timelines in order to obtain the bomb codes to defuse them.
- Bomb #0: Obtained in the DIO ending. The code is LXA QNS GDQ
- Bomb #1: Obtained in the TENMYOUJI ending. The code is BQZ RGJ DXR
- Bomb #2: Obtained the ALICE ending. The code is EQD DYR NTK
- Bomb #3: Obtained in the SIGMA ending. The code is LXQ LHC NMR (US/EU) or BKZ XCN KKR(JAP)
In the final hidden file, it says to +1 to alter the bomb codes from gibberish to something meaningful. This means to move forward one letter of the alphabet for each letter.