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Megaquarium

Megaquarium

The public aquarium simulator. Design your displays, look after your fish, manage your staff and keep your guests happy! It's all in a day's work as the curator of your very own Megaquarium.

Released Sep 13, 2018 Developer Twice Circled Platforms Windows · Mac · Linux CasualSimulationBuildingSandboxManagement
View on Steam ↗ $7.49 (US · as of 2026-07-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.

95.1%positive3,374 reviews
Recommended · 31 found this helpful

“There are so many review from people who have 200+ hours into this game. That alone should tell you that its a game to come back to over and over again. If you enjoyed the old school Sims Safari/Sims Park/Zoo Tycoon it has all the nostalgic feelings and brings that same spark of…”

— a player, Steam review · 291 hrs played
Recommended · 18 found this helpful

“278 hours played at time of review. 100% worth it, so relaxing. Every DLC owned thus far. Every time they release something new or an update I am so excited. Gameplay is simple and fairly straight forward. The Levels and the Sandbox are so well explained how to play and how to…”

— a player, Steam review · 302 hrs played
Recommended · 7 found this helpful

“Megaquarium is a genuinely great tycoon. The management side is excellent. You’re balancing tanks, filtration, staff, animal needs, and visitor flow, and suddenly you realize you’ve spent twenty minutes deciding where to place a single pump. That’s the good kind of tycoon brain…”

— a player, Steam review · 122 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live count fetched 2026-07-11 12:45 UTC · history via SteamCharts.

52playing at last check
8024-hour peak
903all-time peak
0 250 500 2019 2021 2023 2025 315 avg · Sep 2018

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-07-25.

25achievements
11.9%median completion
0.2%rarest: Sandbox Trials - Prestige time trial
71.8% of players 47.3% of players 39.0% of players 33.6% of players 29.4% of players 27.5% of players 22.5% of players 19.2% of players 17.9% of players 15.1% of players 14.1% of players 13.1% of players 11.9% of players 11.4% of players 8.7% of players 7.7% of players 4.5% of players 4.4% of players 2.2% of players 1.6% of players 1.5% of players 1.0% of players 0.9% of players 0.3% of players 0.2% of players 71.8% 0% most earned rarest
Almost everyone has
71.8%Complete 1. Sunnyside — Complete all objectives in level 1. Sunnyside.
47.3%Complete 2. North Woods — Complete all objectives in level 2. North Woods.
39.0%Popular — Have 1000 guests enter your aquariums.
Rarest badges of honor
0.2%Sandbox Trials - Prestige time trial — In Sandbox mode, accumulate 8000 Prestige before the end of Day 100, using the Quick Start preset on normal difficulty or higher.
0.3%Sandbox Trials - Species time trial — In Sandbox mode, have 70 different species in your aquarium before the end of Day 100, using the Limited Supply preset on normal difficulty or higher.
0.9%Sandbox Trials - Limited Veteran — In Sandbox mode, have 80 different species of animals in your aquarium using the Limited Supply preset on hard difficulty or higher.

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.

$7.49−70% right nowcurrent · sampled 2026-07-26 08:39 UTC
$24.99base price
$7.49lowest since tracking began2026-07-16
US7.49 USD−70%
EU7.64 EUR−70%
UK6.74 GBP−70%
Australia10.48 AUD−70%
Canada8.99 CAD−70%
Japan945 JPY−70%
Brazil25.19 BRL−70%
China27.90 CNY−70%

Regional prices at last sample, in local currency — Steam sets each region's price independently.

China≈$4.1 Brazil Japan Canada Australia US EU UK≈$9.0

Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.

$0 $25 $50 07-11 07-13 07-16 07-19 07-22 07-26

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Jun 05, 2026
v5.1.5 patch

Dear Curators,A few small bug fixes this time. Details below.Tim Twice Circledv5.1.5 ChangelogFixed bug: Schooling Bannerfish had a warning icon but nothing listed unless Invertebrilliant DLC was inst

Apr 19, 2026
v5.1.4 patch

Dear Curators,Just a single bug fixed, introduced 2 patches ago with the optimisation updates.Tim Twice Circledv5.1.4 ChangelogFixed bug: simulation stalled if you added lights to a polar dome, saved

Apr 16, 2026
v5.1.3 patch

Dear Curators,This patch contains bug fixes.Tim Twice Circledv5.1.3 ChangelogFixed bug: game was giving 'eat or damage' warnings incorrectly for Button Polyps (heavily armored).Fixed bug: minor issue

Apr 02, 2026
v5.1.2 patch

Dear Curators,This patch contains bug fixes and some minor performance improvements that could help very large aquariums.Tim Twice Circledv5.1.2 ChangelogOptimisation: Reduced the frequency of multi-t

Mar 25, 2026
v5.1.0 Replay the base campaign with collection DLCs plus other improvements

Hello Curators,It's been a busy time since the launch of the Invertebrilliant Collection last month. Thank you to everyone who purchased the DLC, and welcome to all the new players who have joined us

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Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-05-20.

GenresCasual, Indie, Simulation, Strategy
Player tagsCasual · Simulation · Building · Sandbox · Management · Underwater · Creature Collector · Cute · Relaxing · Resource Management · Indie · Moddable (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Steam Workshop · Camera Comfort · Custom Volume Controls · Adjustable Difficulty · Mouse Only Option · Save Anytime
LanguagesEnglish, French, German, Spanish - Spain, Polish, Russian, Simplified Chinese, Portuguese - Brazil, Italian, Japanese
Achievements25
Estimated owners200,000 – 500,000 (SteamSpy)
Official sitehttp://www.megaquariumgame.com
Minimum system requirements (PC)

Minimum: Requires a 64-bit processor and operating system OS *: Windows 7 64 bit Processor: Intel Core i5-4690 or AMD Ryzen 7 2700U Memory: 8 GB RAM Graphics: GeForce GTX 560 or AMD Radeon HD 7770 Storage: 1 GB available space