Undertale Multiverse Simulator 1.5

Actionby SlayerRealNotFakeMaturity: Mild · 9+

▶ Open our video Roblox ↗

Undertale Multiverse Simulator 1.5 is a Roblox action game by SlayerRealNotFake.

386playing · sampled Oct 30, 2026, 4:16 PM UTC−7

—24-hour average vs the same 24 hours last week: not enough data for a fair comparison

Oct 28, 2026last game update on Roblox

88% of Roblox votes are likes

Players, last 7 days

Oct 28, 2026┆ game update Oct 28, 2026Oct 30, 2026

Over the last 7 days Undertale Multiverse Simulator 1.5 ranged from 304 to 498 players (2-hour averages). The first sample in the window was 389, the latest 373. A game update on Roblox was detected on Oct 28, 2026 (dashed line).

Daily numbers (table)

Undertale Multiverse Simulator 1.5 players per day
Day (UTC−7)	Average	Peak
Oct 28, 2026	389	389
Oct 29, 2026	389	498
Oct 30, 2026	408	463

Source: BloxRadar samples of public Roblox player counts, about every 30 minutes, averaged per 2 hours.

Highest daily peak we've recorded: 751 players (Oct 3, 2026) · 30-day average: 402 players · tracked since Sep 29, 2026.

Undertale Multiverse Simulator 1.5 update history

Oct 28Title tag changed to “Halloween”
Oct 28Updated on Roblox
Oct 15Title tag changed to “M87”
Oct 15Updated on Roblox
Oct 10Updated on Roblox
Oct 6Updated on Roblox
Oct 4Updated on Roblox
Oct 2Title tag changed to “Corruption”
Oct 2Updated on Roblox
Sep 30Updated on Roblox

From our own tracking of the game's Roblox page (last 60 days). Update times are when Roblox's "updated" date changed.

What we found

Game title is [Halloween] Undertale Multiverse Simulator 1.5 by SlayerRealNotFake, genre Action — Our player tracking
Pesti Sans Defeated badge: 'Defeat Pesti Sans to get this badge', Roblox rarity 0% — Our player tracking
Fdy Dust Sans Defeated badge: 'blaster circle guy', Roblox rarity 0% — Our player tracking
Halloween Badge: complete Reaper of Halloween's quests; Roblox rarity 5.3%; awarded 450 times yesterday; added 2026-10-19 — Our player tracking
'youve pushed too far' badge awarded 63 times yesterday; 'but he gave up...' badge awarded 30 times yesterday — Our player tracking

From our video published Oct 30, 2026. Written by BloxRadar from the sources shown.

Common questions about Undertale Multiverse Simulator 1.5

How many people play Undertale Multiverse Simulator 1.5?

386 people were playing at our latest check (Oct 30, 2026, 4:16 PM UTC−7). Over the last 30 days it averaged 402 players. The highest daily peak we've recorded is 751 players, on Oct 3, 2026.

When was Undertale Multiverse Simulator 1.5 last updated?

Roblox shows its last update on Oct 28, 2026. We saw updates on 6 different days in the last 30 days.

Is Undertale Multiverse Simulator 1.5 OK for kids?

Roblox rates it Mild (9+): it may have mild violence or light fear.

Badges Roblox rarity, rarest first — not a success rate (what it means)Rarest badges →

Fdy Dust Sans Defeated<0.001%

Pesti Sans Defeated<0.001%

but he gave up...0.4%

youve pushed too far0.7%

“...” (its real name on Roblox)1%

Halloween Badge5%

Codes

We haven't checked codes for this game yet.

"Listed as active" means a source we checked lists the code that way. We don't redeem codes, so we can't promise one works — codes can expire without warning.