Upon attempting to call someone using the Cell Phone in either of these rooms, the default message 'There's no response.' appears. The corridor itself becomes inaccessible once the protagonist leaves it and all values drop to 0. Once the protagonist leaves Room 269 back into Room 268, the door disappears from the corridor, though it is possible to exit the room and trigger the door's reappearance, as the fun values do not reset until the protagonist leaves the hall. The door in the aforementioned hallway leads to Room 269. These are the 'Crystal' SAVE Point and Sans's telescope rooms, respectively. In this scenario, Room 268 (room_water_fakehallway), a hallway with a 10% chance to contain a gray door, appears between Room 94 (room_water_savepoint1) and Room 95 (room_water11).
This room can only be accessed when the game's fun value (which can be changed by editing file0 and undertale.ini) is set to 66. Unlike every other NPC, they have no collision physics, and interacting with them causes them to react in surprise and vanish while a sound effect plays.
The figure is black and white with a distorted, cracked face. In Room 269 (room_mysteryman), a figure (spr_mysteryman) widely believed to be Gaster can be found.
Undertale Review - Nintendo Switch Update
