Verified Active: August 2026
Undertale Multiverse Simulator 1.5 Codes (August 2026)
All active and working promotional codes for free Souls, Gaster Shards, EXP potions, and limited edition AU character accessories.
Active Redeem Codes (5)
Status: Verified Working| Code | Reward | Action |
|---|---|---|
MULTIVERSE15NEW | 5,000 Souls + 2x EXP Potion (30 mins) | |
ERRORSANSNEW | 250 Gaster Shards + Puppet String Aura | |
INKSANS2026 | 3,000 Souls + Giant Paintbrush Prop | |
DETERMINATION | 1,500 Souls + Instant Phase 2 Stamina Refill | |
RELEASE | 1,000 Souls |
Bad Time Guild VIP & Daily Determination Streak
Bad Time Guild VIP Status
Join the official Roblox creator group to unlock a permanent +20% Soul yield on all PVP & PVE battles and a glowing Bad Time Cyan Eye aura!
Daily Determination Streak
Log into Undertale Multiverse Simulator daily to receive escalating Gaster Shard bundles, Phase 3 awakening tokens, and legendary AU character skins.
How to Redeem Codes in Undertale Multiverse Simulator
- Launch Undertale Multiverse Simulator 1.5 on Roblox.
- Spawn into the Judgement Hall or Multiverse Void lobby.
- Click the Twitter / Codes icon on the left side of the screen.
- Type an active promo code into the text field.
- Press the green Redeem button to claim instant Souls and Gaster Shards!
Expired Codes (2)
BETA100 (100 Souls)FELLSANSPASS (Fell Aura)