Lamented Suicide Mouse is a fan-made antagonist in Abandoned: Discovery Island.
Lamented Suicide Mouse is a more distorted and dirty version of Suicide Mouse. His body isn't missing any parts besides his left ear, and a small chunk of his head. His body is dusted and dented, especially around the head and torso. His shoes are slightly caved in, but aren't missing any parts, while the right button on his shorts is chipped and broken.
Lamented Suicide Mouse starts in the Suit Warehouse off camera. When active, he will be seen walking across the room. He will then move to Character Prep 2, where he is seen crawling into the window. He will then move to the Staff Area, where he is seen staring into the camera. He will then move to the Meat Freezer, where he is seen standing in the center of the room. He will then move to the Office through the right entrance. He will be seen standing near the door. The player must hide under their desk to get rid of him. Failing to do so will result in a jumpscare.
After the events of Abandoned: Discovery Island, Lamented Suicide Mouse and all of the other suits were moved to a hidden warehouse by the SSA. Greg tasked Lisa with a week long night shift at the warehouse to keep the suits from escaping. Lisa experienced a tragic and horrifying week at the warehouse, the suits attempted to attack and kill her, and even trapped her in an underground area, where more suits attempted to kill her there. After Night 5, Lisa had enough of the suits, and burned the warehouse down, taking the suits with it and sending them to the deepest darkest depths of Hell forever.
Lamented Suicide Mouse starts on Night 3 in the Television Room, where he is seen sitting up against the wall. When active, he is seen standing up, facing the back wall. When he is active, the televisions in the Television Room all have bright white screens. He will then move to the Main Area, where he is seen standing in the doorway. He will then move to the Shipping Dock, where he will enter the vents and appear on the Vent System camera. where Lisa must turn on the heat to cause Lamented Suicide Mouse to back out of the vent. If Lisa does not do this in time, he will drop from the ceiling and kill her, resulting in a game over.
On later nights after emerging from the Television Room, he has a chance to go to Office Entrance A, where Lisa must close the industrial door to the Office using a button on the camera system. If Lisa does not do this in-time, Lamented Suicide Mouse will enter the Office. Lamented Suicide Mouse will not be fooled by the camera flash. Instead, Lisa will have to hide in the locker behind her. If Lisa takes too long to enter the locker, Lamented Suicide Mouse will force open the locker door and kill Lisa, resulting in a game over.
- Instead of being Suicide Mouse, he was originally going to be Lamented Happy Mouse. This was changed due to Happy Mouse not being a main character.
- When moving, a very slowed and muffled version of the audio from suicidemouse.avi will play.