[X10 LUCK BOOST!] Undertale: Underground's RNG
A Roblox experience owned by Underground's RNG Community.
SimulatorENUndertaleRNG/GachaCollection
Description (written by the developer; not a statement by this register)
Welcome to Underground's RNG! An Undertale - Deltarune Fangame! Codes: SoulsWeek — 500,000 bones, 5 godly luck potions and a godly lootbox SoulsUpdate — 300,000 bones, 5 godly and 5 medium potions, 5 normal and 2 skeleton lootboxes PvPArena — 250,000 bones and 6 medium luck potions ButItRefused — 200,000 bones and 3 godly luck potions TheKingReturns — 150,000 bones, 4 medium potions and a skeleton lootbox BadTime — 150,000 bones and 5 normal lootboxes Roll to discover different underground timeline characters, collect rare companions, earn Bones from duplicates, upgrade your luck, increase roll speed, use potions, claim daily rewards, and unlock titles. Complete the Index, show off your best finds, and keep rolling for the rarest timelines. New characters, effects, titles, and rewards coming soon. Tags: Undertale,Deltarunes, Sans aus, Undertale RNG, sans undertale, Deltarune
Last updated by the developer 25 Jul 2026, 15:32 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 We do not publish numbers we have not measured.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, 04:03 | 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.
Like ratio over time
Growth
| Measured (UTC) | % liked | Change |
|---|---|---|
| 25 Aug 2026, 15:07 | 85 | no change |
| 15 Aug 2026, 14:52 | 85 | first reading |
Percentage of votes that are likes, at each of our measurements. A falling line is a game losing its crowd’s goodwill.