Megaquarium

Megaquarium is a PC aquarium management and economic simulation game from Twice Circled, the studio behind Big Pharma. Steam currently lists the game under its original name, with no verified rebrand or replacement edition. You design public exhibits, care for marine life, train staff, and turn a modest collection of tanks into a carefully planned visitor attraction.

Build an aquarium around living systems

The central loop combines isometric construction, business management, and animal-care logistics. You place tanks, connect pumps and filtration equipment, arrange walkways, add decorations, and populate each exhibit with species whose needs must be satisfied. A visually impressive room is not enough if the water quality, temperature, food supply, or habitat conditions are wrong.

Each animal brings a different management problem. Some species need particular water conditions, others require specific food or tank space, and incompatible animals can become a serious risk. Predatory behavior, territorial preferences, group sizes, and indirect feeding relationships make tank planning more involved than simply matching colorful fish with an attractive backdrop.

Visitors are part of the same balancing act. They expect accessible exhibits, clean facilities, food and drink options, and enough variety to justify moving through the aquarium. Your revenue comes from the attraction itself and from visitor services, while prestige measures how appealing the venue has become.

Research, staffing, and aquarium logistics

Progression is driven by several connected resources. Guest activity helps generate Ecology Points and Science Points, which unlock new animals, equipment, and technologies. Regular cash pays for construction, livestock, staff, and facilities, so an ambitious exhibit can create pressure elsewhere in the operation.

Staff are not interchangeable workers. You hire aquarists with different skills, then decide whether to develop flexible generalists or specialists suited to feeding, cleaning, maintenance, and other recurring jobs. Staff movement matters because distant tanks and poorly arranged work areas can turn routine care into an operational bottleneck.

The newer update structure also gives experienced players more control over staff behavior. Advanced priority options let you direct skilled employees toward demanding tasks while preventing less-qualified workers from taking jobs they are not prepared to handle. That makes workflow management a meaningful part of larger aquariums rather than a background detail.

Campaign structure and sandbox freedom

The campaign introduces the systems gradually through a series of aquarium challenges. Early scenarios teach tank construction, finances, staffing, research, and visitor management before later missions combine them into tighter spatial and economic puzzles. The campaign is not a character-driven adventure; it is a sequence of management problems that steadily expands your toolkit.

Sandbox mode is the natural destination for players who want to design without following a fixed scenario path. You can shape the starting conditions, determine which animals and technologies are available, and pursue your own layout goals. Sandbox objectives add optional structure for players who want specific design or management targets instead of a completely open build.

The game also supports a close-up way to inspect your finished work. While the main view is designed for planning and management, zooming in allows you to experience the aquarium more like a visitor, making exhibit presentation and room layout feel more tangible than a conventional top-down tycoon interface.

Base game and paid content

The paid base game contains the core marine aquarium simulation, campaign, sandbox play, staff systems, research progression, Steam Workshop support, and a broad selection of aquatic species. Steam describes the collection as including almost 100 marine species across fish, sharks, crustaceans, corals, jellyfish, other invertebrates, and a turtle.

There are four paid add-ons currently listed for the game. Freshwater Frenzy expands the focus beyond marine habitats with new freshwater animals, tanks, decorations, breeding features, and a dedicated campaign. Architect's Collection emphasizes construction, adding structural pieces such as bridges and tunnels alongside new animals and design tools.

Deep Freeze - Deluxe Expansion covers deep-ocean and polar environments, including species such as seals and Adélie Penguins, plus new care requirements, decoration options, and a multi-level campaign. The Invertebrilliant Collection adds 15 tropical marine invertebrates, including the Boxing Shrimp, Hammer Coral, and Variable Neon Slug, along with Backdrops, Centerpieces, Underfloor Tanks, Magnifying Tanks, Vista Tanks, Raised Tanks, new plants, substrates, and sandbox objectives.

The latest expansion also coincides with broader improvements to the base game. Coral placement, calcium requirements, staff priorities, interface filtering, and campaign compatibility with collection content all make the current version more flexible than the original feature set. The important commercial distinction is simple: the base game is paid, and the four themed content packs are separate purchases.

Who should play Megaquarium?

Megaquarium suits players who enjoy systems-driven management more than spectacle. Its strongest moments come from solving practical problems: hiding filtration equipment from guests, routing staff efficiently, keeping incompatible species apart, and expanding a cramped floor plan without damaging visitor flow.

It is a good fit for aquarium enthusiasts, creative builders, and fans of compact tycoon games with readable rules and meaningful consequences. The game is also more approachable than a large-scale zoo simulator because the building area and animal roster keep the focus on exhibit logic rather than terrain sculpting or complex genetics.

Players looking for action, multiplayer, or a heavily scripted narrative should look elsewhere. The PC version is explicitly single-player, and its long-term appeal comes from campaign mastery, sandbox experimentation, and improving the efficiency and presentation of your aquarium.

PC features and localization

The PC release includes Steam Workshop, Steam Cloud, Steam Achievements, and Family Sharing. Workshop support is particularly relevant because it extends the game's creative lifespan beyond the included scenarios and lets the community build around the same aquarium-management framework.

The storefront lists support for English, French, German, Spanish, Polish, Russian, Simplified Chinese, Brazilian Portuguese, Italian, and Japanese for interface and subtitles. It does not list full audio localization. The game is available on PC, Mac, and Linux, giving it broader desktop coverage than many management games in the same niche.

There is no verified controller-specific feature prominently listed on the current PC storefront, so keyboard and mouse should be treated as the safe default for detailed placement, staff assignment, and tank management. Likewise, there is no confirmed multiplayer, co-op, split-screen, or dedicated-server mode to plan around.

Comparable management games on PC

Players who like aquarium layout, visitor needs, and staff logistics may also enjoy museum management games such as Two Point Museum, although its exhibits are built around artifacts and expeditions rather than animal habitats.

For a broader wildlife-management challenge, detailed zoo builders like Planet Zoo offer deeper habitat construction, animal welfare systems, and larger creative spaces. Megaquarium is more compact and more focused on tank compatibility and infrastructure.

If you prefer a lighter and more traditional tycoon structure, classic animal-park management in Zoo Tycoon provides a useful comparison point. Megaquarium stands apart by making pumps, filtration, feeding, temperature, and species compatibility the center of the management puzzle.

Megaquarium FAQ

Is Megaquarium still called Megaquarium on PC?

Yes. The current Steam storefront lists the base game as Megaquarium, and no verified rebrand or successor name replaces it. The newer product names belong to optional expansions, including Freshwater Frenzy, Deep Freeze, Architect's Collection, and Invertebrilliant Collection.

Is Megaquarium multiplayer or co-op?

No. The PC storefront lists the game as single-player. There is no confirmed online co-op, local co-op, split-screen, or competitive multiplayer mode.

What is the main gameplay loop?

You design exhibits, buy and care for aquatic animals, manage water systems, hire and direct staff, satisfy visitors, earn money and research points, and unlock more advanced species and equipment. Campaign missions provide structured challenges, while sandbox mode supports open-ended aquarium design.

How many expansions does Megaquarium have?

The current PC catalog lists four paid expansions: Freshwater Frenzy, Architect's Collection, Deep Freeze - Deluxe Expansion, and Invertebrilliant Collection. The base game remains the foundation, while each add-on targets a distinct habitat, construction style, or animal group.

Does Megaquarium support mods?

Yes. The PC version includes Steam Workshop support. This allows community-created content to extend the aquarium-building experience, although campaign behavior can be affected when mods change core game rules or tank dimensions.

Does Megaquarium have a campaign?

Yes. Its campaign is a sequence of management scenarios that gradually introduces construction, staffing, research, visitor services, and more demanding animal-care requirements. It is best understood as structured aquarium management rather than a story-heavy campaign.