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Undertale Online (OPEN)

Undertale Online (OPEN)

A Roblox experience owned by Undertale Online.

OtherENUndertalefan-gameabandoned

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

This game is being postponed due to lack of resources, however an alternative project is being developed. This is to not mislead people into believe this is the project that is being brought to fruition. Now open for prospectors to speculate what could've been.

Last updated by the developer 6 Apr 2024, 07:32 UTC.

0
playing (measured 11 Aug 2026, 12:45 UTC)
12,074
lifetime visits
79%
liked (204 👍 / 54 👎)
951
favourites (78.8 per 1k visits)
12 November 2017
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 We do not publish numbers we have not measured.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)PlayersChange
11 Aug 2026, 12:450first reading

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

Monetization — game passes

[PRE-ORDER] Double Mentors
2,500 R$
[PRE-ORDER] Choose your Soul
1,250 R$
[PRE-ORDER] Web Fees
600 R$
[PRE-ORDER] Lab Partners
500 R$
[PRE-ORDER] Dimensional Phone
150 R$
[PRE-ORDER] Monster Species Expansion 2
50 R$
[PRE-ORDER] Monster Species Expansion
50 R$

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