A sudden rift appears, from doors called A-000 and -50. It opens slowly and reveals five small, but lethal entities. MOBILE FRIENDLY NOW!!! SCRAPED EVENTS: Attack mode, you can now kill each entity and they will disappear for the attack. Shall be a separate game, or shall be implemented into main game, deleting the game or event after a week. (SCRAPPED) CLICK FLAG TWICE TO START Upcoming content:- Adding A-120 and Bone-120, Bone-120 will slowly chase the player with its extended length. Adding The backdoor entities
Update logs: 16 September 2025 (Patch 1) Added A-90, Bone-90, Bone-60, Bone-120 (The Bones moved apart to make a Smile) Made a Boss fight available, Removed hidden attack button 16 September 2025 (Patch 2) Removed Bone-120 until the bug where a-120 would not follow and instant kill the player is fixed 16 September 2025 (Patch 3) Added A-60 and bone time to change is random 17 September 2025 (Patch 1) Nerfed A-60 due to it being very hard, (A-60's speed before: 15) (A-60's speed now: 8) 17 September 2025 (Patch 2) Changed player max health to 250 17 September 2025 (Patch 3) A-60 has a very low chance of spawning as the first entity encountered 17 September 2025 (Patch 4) Added a health Damage for A-90 and made space key to change image 17 September 2025 (Patch 5) Removed Second Damage screen and updated the First one 17 September 2025 (Patch 6) A-90's Attack is faster now 18 September 2025 (Patch 1) Buffed some of A-60's bones and made them speed up to 10 21 September 2025 (Patch 1) Added A-120, Bone-120 21 September 2025 (Patch 2) Made A-120 a secret entity until the bones stop going everywhere 21 September 2025 (Patch 3) Added Curious light 23 September 2025 (Patch 1) Fixed Curious light only having one bone 23 September 2025 (Patch 2) Made A-60 A-90 A-120 Curious light Haste images disappear so the player can see where the bones and they are 23 September 2025 (Patch 3) Nerfed A-60 the last time, making all the bones speed to 8 23 September 2025 (Patch 4) Added Haste, Good luck trying to beat it without taking damage... :) 22 October 2025 (Patch 1) Renamed game to "Undertale rooms and backdoors battle", fixed bones problem 26 October 2025 (Patch 1) Made it mobile friendly, Fixed A-90 not attacking for mobile controls, Added disappearing fog thingy. 26 October 2025 (Patch 2) Made it so that you dont take A-90 damage from moving into other entities bone attacks 28 October 2025 (Patch 1) Made mobile speed faster for running away from A-60's bones 28 October 2025 (Patch 2) Increased Fog, Decreased Fog back to 80, Changed color of cursor 29 October 2025 (Patch 1) Decreased Haste maximum attack time and added Blitz