Undertale RNG Codes (September 2026)
Undertale RNG codes pay out free in-game goodies to help you along as you roll. Nothing wrong with a little boost early on.
If you know Undertale and Deltarune, this Roblox spinoff will click fast. You roll for custom auras (there are well over a hundred and counting), take on PVE fights out in Snowdin and Castletown, complete missions, use abilities, and craft your way toward better gear. The codes are a solid way to stock up before you sink hours into hunting the rarest auras. Punch them in soon, since these expire and stop working once they do.
Working codes are listed right below.
Quick Answer: That’s 1 active code up for grabs in Undertale RNG right now. Codes are case-sensitive — copying beats retyping.
Updated September 24, 2026. Freshest code right now is duck, checked today. Expired Undertale RNG codes are kept below for reference.
Working Undertale RNG Codes
Currently redeemable in Undertale RNG: everything in this table. Codes get pulled without warning, so don’t sit on them.
| Code | Rewards |
|---|---|
duckNEW | 2 Heavens [Expires September 26th] |
How to Redeem Your Undertale RNG Codes
Redeeming in Undertale RNG takes one short detour from the main menu:
- Tap the ACT button located in the bottom right corner, then select the Info button.
- Select Codes, type an active code into the Enter code text box, and press the black/white Redeem button.
- Your free code rewards arrive right away if the code hasn’t expired.
- Otherwise, tell us in the comments!
Where to Find More Undertale RNG Codes
Keep an eye on the announcements and pinned posts in The Project Soul Team’s Discord server, since that’s where new Undertale RNG codes usually surface first, typically alongside an update, a new aura wave, or whatever milestone the game just hit. Or just check back here, because we sweep for new ones daily and you won’t have to scroll through a few hundred messages about luck rolls to find them.
Expired Undertale RNG Codes
78 expired codes have rotated out. Skip them — they’re here only as a record.
Show all 78 expired Undertale RNG codes
| Expired Code | Was |
|---|---|
alwaysblametesters | Freebies |
npcfix2 | Freebies |
npcfix3 | Freebies |
duckhuntfix | Freebies |
npcfix | Freebies |
jarona | Freebies |
summereventpatch | Freebies |
meowmeowmeow | Freebies |
updatesoon | Freebies |
blametesters | Freebies |
eastereaster | Freebies |
eastereventpart2balances | Freebies |
eastereventbugfixes | Freebies |
eastereventpart2 | Freebies |
easterevent2026 | Freebies |
secondchaosfullevent | Freebies |
easterevent | Freebies |
merchant0stockfix | Freebies |
souladjustment | Freebies |
aprilfools3 | 10 Heavens |
aprilfools | 15 Heavens |
aprilfools2 | 15 Heavens |
7april7fools7 | April fools aura, title, gear | 50 k DD$ |
soulsrollbugfix | 160k DD$ |
chaosupdate | Freebies |
soulsssssssssssssss | Freebies |
soulsfreerolls | 100 k DD$ |
soulsfreeupgrades | 50 k DD$ |
chaoscode | 100 DD$ | 15 Heavens |
greensmells | freebies |
greensupersuksatcode | freebies |
chaosheaven | freebies |
newheavens | freebies |
minipatch2026 | freebies |
mttquestbugfixes | freebies |
newgear2026 | freebies |
sneakpeek | 100-1000 Snowflakes | 10 Heavens) |
10kgroupmembers | freebies |
quickfix | freebies |
halloween2 | freebies |
halloween! | freebies |
november_3rd | freebies |
halloweensoon | 3 Heavens |
eventbugfixes | 1000 Lucky Chocolate {event currency} |
4mevent | 5 heavens |
4mvisitsv1 | 300 Lucky Chocolate {event currency} |
bugs | freebies |
solarscriptingmoment | freebies |
solarscriptingmomentv2 | freebies |
solarscriptingmomentv3 | freebies |
solarscriptingmomentv4 | freebies |
solarscriptingmomentv5 | freebies |
delayupdate | freebies |
delayupdatev2 | freebies |
almostmonthdelay | freebies |
buttonhuntv3 | 2 Niko’s and 2 Heavens |
chaosmoment | 2 Niko’s and 2 Heavens |
mikomoment | 4 Niko’s and 1 Heavens |
patchbutton | freebies |
chaosmomentagain | freebies |
1qwerty23niko32hi2 | |
solarbugs | |
bugfixesv2 | |
ilovechaos | freebies |
ilovechaos2 | freebies |
goop | freebies |
sorryforissuesv2 | freebies |
shutdownnumber37 | freebies |
shutdownnumber36 | freebies |
shutdownnumber35 | freebies |
roaringupdate | 10 niko?? |
recoverplsniko | 5 niko?? |
newupdate | 2 niko??, 2 heaven |
soongoal | x1 Monster Candy |
balances | tons of freebies |
bugfixes | x3 Tastes of Heaven |
celebrationv3 | YIPEEEButOnceAgain?????? Aura |
yayupdate | x5 Tastes of Heaven |
Why Are My Undertale RNG Codes Not Working?
Most failed codes come down to a typo rather than an actual problem with the code. Copying the text directly from a list and pasting it into the game removes that risk, since the entry has to match exactly. Beyond that, some codes have genuinely expired and will no longer redeem.
