Undertale Monster Mania 2019 Legacy Edition
A Roblox experience owned by robloxo studios.
RoleplayENUndertaleRPGLegacy Version
Description (written by the developer; not a statement by this register)
This is a older build of Undertale Monster Mania before it became what it is in it's modern form. It doesn't have any modern "joke" content such as Ohio and the Slop Machine 5000. If you previously had data, it won't be ported over to this version of the game. This version of UTMM is prone to being buggy. Have fun. Undertale Monster Mania by Nikolander and A_RandomDoggo Undertale by Toby tags so people could find the game without playing saveinstanced copies ok ? MM Revival, UTMM Reborn, Undertale Monster Mania Old, UTMM 2019, MM Revived
Last updated by the developer 7 Jul 2026, 08:20 UTC.
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 We do not publish numbers we have not measured.
| Measured (UTC) | Players | Change |
|---|---|---|
| 10 Aug 2026, 17:17 | 0 | first reading |
Concurrent players at each of our measurements (insert-on-change).
Like ratio over time
Growth
| Measured (UTC) | % liked | Change |
|---|---|---|
| 27 Aug 2026, 09:08 | 94 | no change |
| 17 Aug 2026, 09:07 | 94 | first reading |
Percentage of votes that are likes, at each of our measurements. A falling line is a game losing its crowd’s goodwill.