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[X10 LUCK BOOST!] Undertale: Underground's RNG

[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.

1
playing (measured 11 Aug 2026, 04:03 UTC)
68,173
lifetime visits
85%
liked (791 👍 / 143 👎)
920
favourites (13.5 per 1k visits)
14 June 2026
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 We do not publish numbers we have not measured.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, 04:030first reading

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

Monetization — game passes

Cosmestic pack!
1,499 R$
Evolution dust
499 R$
GT! Gaster
399 R$
x2 Bones
199 R$
Instant Rolls
199 R$
VIP
199 R$
+2 Units Equip (Visual)
99 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

Bravery · other3,003 · 55.6% win
25k Visits event · other1,243 · 0.00% win
Justice · other1,200 · 22.2% win
kindness · other1,078 · 11.1% win
Patience · other1,049 · 66.7% win
Perseverance · other1,039 · 11.1% win
Integrity · other1,023 · 0.00% win
Determination · other694 · 11.1% win
Hate · other498 · 0.00% win
First time rolled 1/1M (Xgaster) · collection461 · 0.00% win
Murder Time Trio (50k Visits Event) · other410 · 0.00% win
OVERWRITE SOUL · other146 · 22.2% win
First time rolled 1/10M (King Multiverse) · other77 · 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.

Like ratio over time

Growth

8515 August 2026 — 85 % liked25 August 2026 — 85 % liked15 August 202625 August 2026
2 measurements spanning 10 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 84–86 and does not start at zero.
Measurement log — every % liked count we have recorded
Measured (UTC)% likedChange
25 Aug 2026, 15:0785no change
15 Aug 2026, 14:5285first reading

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