The string refers to a specific release of the Survival Mode DLC by the group PLAZA for the PC version of Hyperdimension Neptunia Re;Birth1 . Survival Mode Overview

This DLC adds a competitive to the in-game Coliseum. It is designed for veteran players seeking a high-level challenge.

: It is highly recommended to have the additional level cap DLCs (increasing the cap to 999), as the highest-tier Coliseum challenges are tuned for levels far beyond 99. Hyperdimension Neptunia Re;Birth1 Survival Mode - Steam