, GAMER S HELP DESK
Fielle Peregrino How can I find Gaster in Undertale? To increase your chances of spotting Gaster, you have to hack the game a bit. Open the Run app on your PC and type %appdata%, then go to the Local folder and click the Undertale subfolder. Before you do anything, copy all the files in the Undertale subfolder and paste them in a new folder. Open the undertale.ini file and change the Fun value to 66 and the Room value to 95, then save. Open up file0, change the value on the 36th line to 66, then go to the second to the last line and replace the value with 95. Save again. Do the same thing on file9. Boot up Undertale and continue the game. Walk to the left, then go right. There’s a 10% chance that a door will pop up, and that’s where Gaster is!