[WE MADE BR GOOD UPDATE] Undertale Monster Mania

A Roblox experience owned by robloxo studios.

RoleplayENUndertaleBattle RoyaleMonster

Undertale Monster Mania is a roleplay experience created on April 27, 2018. It has accumulated 13,563,079 lifetime visits and 82,535 favorites. The experience holds an 81% like percentage. Currently, zero users are playing.

Description (written by the developer; not a statement by this register)

THE Battle Royale UPDATE EVER. Undertale Monster Mania by Nikolander and A_RandomDoggo Undertale by Toby

Last updated by the developer 1 Apr 2026, 13:02 UTC.

playing (measured 10 Aug 2026, 17:17 UTC)

13,563,079

lifetime visits

81%

liked (32,573 👍 / 7,757 👎)

82,525

favourites (6.1 per 1k visits)

27 April 2018

created (per Roblox)

Play on Roblox →

Live players over time

Growth

Growth history is still building. We hold one measurement for this entry. A trend needs at least two, taken days apart — so this will fill in on its own rather than being estimated. We do not publish numbers we have not measured.

Measurement log — every players count we have recorded
Measured (UTC)	Players	Change
10 Aug 2026, 17:17	0	first reading

Concurrent players at each of our measurements (insert-on-change).

Monetization — game passes

SIGMA GRIND GAME PASS 🗿☕

999,999,999 R$

Game passes for sale and their prices, measured from the Roblox passes API. Developer products bought inside the game aren’t publicly listable.

Badge funnel

You've played. · welcome25,845 · 0.00% win

Master of Slop · other4,697 · 10.0% win

The returnal. · other4,622 · 0.00% win

Wowa! You dids it! · progression4,433 · 0.00% win

BEAT THE GREENS. · progression460 · 0.00% win

You've defeated HIM. · progression448 · 0.00% win

Pibby Toilet: DEFEATED · progression131 · 0.00% win

You survived! Somehow. · other114 · 0.00% win

The end · progression52 · 0.00% win

Heaven · progression11 · 0.00% win

How many players have ever earned each badge — a proxy for how far players get before they stop. Steep drop-offs mark where a game loses people. Win rate is the past-day share of players who earned it; categories are assigned by a language model from each badge’s own name and description.

Roblox recommends these alongside it

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Undertale Boss Battlesby Nyzurier

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[ENCHANTING 📖 ]Undertale Mania Of Heroesby AllBluw

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Undertale Survive the Monsters!🔥 [UPDATE WAVE 2]by BowTiedPony

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Roblox’s own “games like this” rail, as we recorded it on 22 August 2026. The order is Roblox’s, not ours. Which games it points at most →

Like ratio over time

Growth

3 measurements spanning 20 days. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 80–82 and does not start at zero.

Measurement log — every % liked count we have recorded
Measured (UTC)	% liked	Change
2 Sept 2026, 18:35	81	no change
23 Aug 2026, 18:30	81	no change
13 Aug 2026, 18:23	81	first reading

Percentage of votes that are likes, at each of our measurements. A falling line is a game losing its crowd’s goodwill.