Sudden Depth has 4 phases. Each phase advances to the next by collecting gold records. Phase 1 being what Agent 3 will hear before any golden records are collected. Phase 4 being the final and complete version of Sudden Depth which Agent 3 will hear when all of Cozy & Safe Factory's golden records are collected.
Sudden Depth is a play on words on the term 'sudden death', a short extra part of a tied game in which a winner is decided.
- This is one of two songs to be a pun on a phrase with "depth" replacing "death"; the other is Till Depth Do Us Part.