How many copies did Under Observation sell?

322 to 524 copies, based on its 13 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Under Observation make?

Under Observation is free to play, so there is no copy-sales revenue to estimate.

How big is Under Observation?

Estimated owners: ≈ 322–524; from 13 reviews (Mostly Positive)

A labeled estimate from the public review count (adjusted for release year), not exact sales. Owner data cross-checked with SteamSpy.

Does this actually work?

We left Under Observation out and predicted the genre from its 8 similar games. Every figure here, including Under Observation's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 110k–133k

best case 1.3M (Unpacking)

Games like Under Observation

The middle of these games

≈ 110k–133k copies

≈ $120k–$817k after Steam's cut

from ~4k reviews

Only the top fifth of 2019’s Steam releases earned about $34k gross, so plan for that or less.

All 8 of your similar games are hits.

Best case: Unpacking at ≈ 1.0M–1.6M copies, ≈ $5.5M–$14.9M after Steam's cut. A breakout hit, far above a typical game.

What it took to get here

About half the games that made it here had over 633 reviews in their first month; the spread ran 234 to 4k.

The genre you'd be entering

Your set: Your set clusters on Puzzle (7 of 8) and Simulation (6 of 8).
The winners: Winners here lead with Puzzle + Story Rich, priced around $20. The breakout hits carry Pixel Graphics + Story Rich + Relaxing; a typical game here doesn't.
The era: The games you compared span 2014 to 2024, and 2 of your 8 shipped in the last two years.

How these numbers were worked out

A hit here: 1,000+ reviews, roughly $150k+ before Steam's cut (a standard indie benchmark).

Copies come from each game's reviews times a sales-per-review rate that falls with release age, from about 31 for the most recent game here to about 70 for the oldest, then widened into a range; revenue rides on that estimate times price. Source: GameDiscoverCo (2020) and VG Insights (2021).

Similar games

Game	Est. copies	Est. revenue	Price	Reviews	Tags
[Chilla's Art] The Closing Shift \| 閉店事件 2022	Est. copies ≈ 79k–129k SteamSpy 50k–100k	Est. revenue $131k–$351k after Steam's cut $237k–$540k before the cut	$5.99	3k reviews Very Positive	AdventureSimulation
Unpacking 2021	Est. copies ≈ 1.0M–1.6M 11x vs typical SteamSpy 500k–1M	Est. revenue $5.5M–$14.9M after Steam's cut $10.1M–$22.9M before the cut	$19.99	41k reviews Very Positive	RelaxingCute
I Expect You To Die 2017	Est. copies ≈ 96k–155k SteamSpy 200k–500k	Est. revenue $657k–$1.8M after Steam's cut $1.2M–$2.7M before the cut	$24.99	3k reviews Very Positive	VRPuzzle
SchoolBoy Runaway 2024	Est. copies ≈ 95k–154k SteamSpy 50k–100k	Est. revenue $52k–$140k after Steam's cut $95k–$215k before the cut	$1.99	4k reviews Very Positive	PuzzleAdventure
Morphopolis 2014	Est. copies ≈ 271k–441k SteamSpy 500k–1M	Est. revenue $298k–$801k after Steam's cut $542k–$1.2M before the cut	$3.99	5k reviews Very Positive	PuzzleIndie
LEGO® Builder's Journey 2021	Est. copies ≈ 107k–174k SteamSpy 200k–500k	Est. revenue $588k–$1.6M after Steam's cut $1.1M–$2.4M before the cut	$19.99	4k reviews Very Positive	IndieCute
Summon 2023	Est. copies ≈ 88k–143k SteamSpy 50k–100k	Est. revenue $24k–$65k after Steam's cut $44k–$99k before the cut	$0.99	4k reviews Very Positive	SimulationMemes
Platform 8 2024	Est. copies ≈ 71k–115k SteamSpy 100k–200k	Est. revenue $78k–$209k after Steam's cut $141k–$321k before the cut	$3.99	3k reviews Very Positive	Psychological HorrorAdventure