From Halopedia, the Halo wiki
Hello Nurse! is a Halo 4 achievement added with the Castle Map Pack. It was unlocked when a player, in Castle DLC matchmaking, healed a near-death teammate with a Regeneration Field five times. It is represented by the Regeneration Field icon with a number 5.
Following the shutdown of Xbox 360 Halo online services on January 13, 2022, this achievement is no longer attainable.
The name "Hello Nurse!" is a reference to a popular vaudeville catcall later re-popularised in the 1990s cartoon show Animaniacs.
- ^ Halo Waypoint: Halo 4 Castle Map Pack Achievements
- ^ Windows Central, Halo Xbox 360 servers have been shut down, ending an era (Retrieved on Jan 23, 2022) [archive]
- ^ Halo Waypoint, Sunsetting Halo Xbox 360 Game Services in 2021 (Retrieved on Jun 1, 2020) [archive]