Unknown Specimen 2 (A.K.A. Otto the Otter) is an enemy that can be encountered in Endless Mode.
Unknown Specimen 2 is a brown animatronic otter with a perpetually open mouth.
Unknown Specimen 2 lacks a chase theme, the only indication of his presence being his deep belly laugh.
He enters the room quickly but slows down to a crawl immediately after. If the player's health bar is depleted by the Specimen, they are met with a jump scare where his face fills the screen and shakes violently.
He attacks fairly quickly (0.40 seconds of cooldown) and deals about 15 damage on contact.
|Belly laugh 1|
|Belly laugh 2|
|Belly laugh 3|
|Belly laugh 4|
- Unknown Specimen 2 is based on the animatronics from the horror game Five Nights at Freddy's, namely Freddy Fazbear, who has a similar laugh.
- He was created due to a group of dedicated Five Nights at Freddy's fans constantly asking Akuma Kira to make a specimen inspired by the game. Akuma Kira then proceeded to create Unknown Specimen 2 as a joke enemy.
Unknown Specimen 2's mouth tends to slightly close and then open back up, as part of his animation. He now has a fully 3D model, along with a proper walking animation, as opposed to the waddling motions of his original sprite. He also has a slight white glow around him, his eyes now giving off a white light and tracking the player.
Unknown Specimen 2 now moves at the same speed as Specimen 5. Unknown Specimen 2 now has his own starting room, which is a pizzeria dining room, with Unknown Specimen 2 standing on a scene nearby. Unknown Specimen 2 will be motionless at first, not damaging the player and lacking a collision box. A slice of pizza will be laying on the ground near him, with the option to "CONSUME" it. Consuming it will show the message "Delicious" and activate Unknown Specimen 2, who will play a small holiday jingle.
His attack cooldown is now 3 seconds instead of 0.40 seconds.
His death screen has also been changed. The death screen sound will play out as normal, now accompanied by Unknown Specimen 2's 3D model approaching the screen while slices of pizza are raining in the black background.
- Unknown Specimen 2 is the only Specimen in Endless Mode that won't play his "chase theme" (which is completely silent) when first encountered in his starting room, except for Monster 3, who completely lacks a chase theme to begin with. The ambient track that plays normally in the mansion will instead keep playing, even as Unknown Specimen 2 activates.
- Unknown Specimen 2's eyes can be seen even when the specimen is out of the player's view, similar to how torches work.