Strategy Guide/Walkthrough/FAQ

Corey Feldman Interview

Cheat Codes

Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a hex editor to edit the "data.win" file in the ame directory. Go to offset "000725B24" and change the "00" to "01" in the fourth row of that offset's line. While playing the game, enter one of the following codes to activate the corresponding cheat function:

Result Cheat Code
+100 Step[Page Up]
Set attacks to 999[Page Down]
Increase battle group5
Next room[Insert]
Previous room[Deleted]
Select saved game file0, 1, 2, 3, or 4
Travel to room_fire2 (138)F + 6
Travel to room_water1 (82)W + 6
Travel to room_tundra1 (44)T + 6
Travel to room_castle_front (219)E + 6
Travel to room_ruins2 (7)R + 6
Travel to room_truelab_elevator (244)Y + 6
Spawn box (while in game)G
+5,000 gold (while in a shop)G
Take out panelO
Put away panelI
Increase murder levelM
Toggle room speedsP
Set room speed to fastF
Enable Undyne callsU
Create file system_information_962[F3]
+500 gold[F7]
Stop sound[F9]
Pass through walls[F10]
Travel to room_water1 (82)[F11]
Restart room[F12]
Show collision boxesV
Fast walk speed[Backspace]
Play current "monster tale" determined by storyline[End]
Battle current group (default is 140)[Home]
Set HP to 999 (while in battle)[Delete]
Slow down (while in battle)1
Decrease speed (while in battle)2
Decrease turn timer (while in battle)8
Increase turn timer (while in battle)9
Set mercy to 0 and attack to 999 (while in battle)[F6]
Set mercy to 9,999 (while in battle)O + P

Secret character

Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "undertale.ini" file. Find the "fun" variable, then change its name to Fun (case-sensitive) and change its value to anything else. You will now find new locations and NPCs related to a new character named "W.D. Gaster".

Hard mode

Enter "Frisk" as your name. If done correctly, you will get a warning that this will make your life hell. In Hard mode, you cannot retreat on the first turn of battles, will face tougher and new enemies, and can only hold three pieces of candy.

Developers' room

Complete the credits without touching any names. You will now be able to open the previously locked big door in Snowdin to access the developers' room.

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