![Undertale Monster Onslaught [TD]](https://tr.rbxcdn.com/180DAY-755a460d0158a44bea875f17f6b96fac/256/256/Image/Png/noFilter)
Undertale Monster Onslaught [TD]
A Roblox experience owned by Shattered Soul Studio's.
Tower defenseENtower defenseUndertalebuggy
Description (written by the developer; not a statement by this register)
Undertale: Monster Onslaught is a tower defence game inspired by Undertale, its pretty buggy but there's mainly 2 Developers working on the game Join group for 100 extra starting cash, PLEASE REPORT BUGS TO THE BLUE APP, (lobby might be a bit laggy we will fix that eventually) NEW CODE AT 500 LIKES (They wont come until next update now though) Current Codes: 500Likes, Maps, [KROMER] btw stop telling me about the stuff in the lobby. I don't put anything that's an actual leak. New icon + Thumbnail by lob0.o Update Thumbnails + Old art by R0bl0xianDeveloper
Last updated by the developer 8 Aug 2026, 12:30 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 We do not publish numbers we have not measured.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 |
|---|---|---|
| 11 Aug 2026, 06:38 | 0 | first reading |
Concurrent players at each of our measurements (insert-on-change).
Monetization — game passes
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
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.