Mods / Hard

• UUndertale Bomb [VERY HARD]by shou_14A very fast gameplay with a very good background.1.2k downloadsupdated 10 y ago
• SSkullFactoryby Ci8irdAdds a new map with few game modes. Map tells us a story about four friend, that decided to go to old Skull Factory. And they had fun! Hope you enjoy it!627 downloadsupdated 7 y ago
• [[JumpShot] Jumperby AnuBiusJump around in this crazy level, but be careful not to jump for to long and get that fresh health from time to time! Bots dont like the Map :(591 downloadsupdated 11 y ago
• UU Mad Bro?by Olimpo2So U mad? ****************************************************************************************************************************** Avoid the spike ball, use teleporters and...Oh! U dead? U mad now? *********************************************************************************************...405 downloadsupdated 11 y ago
• SSpeedrun+by sup3pEach speedrun level is now harder! If you couldn't reach the goal before, good luck now!306 downloadsupdated 10 y ago
• GGod Gun: Hard Jumpby SpencerinspaceLevel for God Gun; it is very hard!103 downloadsupdated 8 y ago
• SSugar Rush: Teleportby VeggieFuSugar Rush Level with a little teleporting flavor added in92 downloadsupdated 10 y ago

7 hard mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.