Deep Freeze is Megaquarium's most ambitious expansion to date, combining the Earth's deep ocean and polar regions into one expansion that's bursting at the seams!

The Abyssal Zone

At a depth of 3000-6000 meters, known as the abyssal zone, some of the world's most weird and wonderful creatures dwell. By recreating these conditions in high-tech abyssal tanks, you can bring these critters to the surface!

From the alien Peacock Squid to crowd pleasers like the Anglerfish and Goblin Shark, you never know what is lurking in the deep.

Polar Party

In the polar domes, seabirds like the Atlantic Puffin and Snow Petrel wheel overhead, while Adélie Penguins and Crabeater Seals lounge on ice floes.

These specialized, enclosed tanks need to be supported by racks of compressors and air conditioners to keep them cold!

Freezing point

An array of fish, specially adapted to freezing temperatures add new variety to your coldwater displays. However, your chillers will be working overtime to keep them superchilled; just one of many demanding new care requirements you'll need to master.

Intelligent animals require interactive decorations to enrich their habitats and the most delicate species require regular observation. Will your staff management skills meet the strain, or buckle under the stress?

Breeding credentials

Establish yourself as a master breeder as you rear a wide selection of baby birds and mammals. Each species has its own distinct breeding requirements, can you breed them all?

Accessories, Posters, Gift Shop and more!

Unlock new accessories to equip your staff with powerful bonuses. Meanwhile, precisely placed posters will net you points and a snuggly addition to the gift shop will swell your coffers.

Create the ice palace of your dreams with frost-themed paint and decorations. Plus, all-new custom substrates allow you to put a creative stamp on tanks like never before.

Assist the ARG

Build your way through the multi-level campaign, helping the Abyssal Research Group (ARG) bring previously unseen deep sea animals into your aquariums.

Additionally, all content will seamlessly integrate into Sandbox mode allowing you to continue your adventure there!


With Megaquarium's second expansion, the Architect's Collection in your arsenal, you'll be equipped to take your aquarium design skills to new heights!

15 iconic animals

From the gigantic Japanese Spider Crab to the majestic Ocean Sunfish, the Architect's Collection is bursting with aquarium heavyweights. At the other end of the scale, the style-conscious Decorator Crab and notorious Mantis Shrimp are sure to pack a punch!

It will take dedication to collect them all, and you'll have to craft habitats to meet their exacting demands, but these aquatic VIPs will reward you with a display like no other.

Calling all architects!

Build bridges above existing thoroughfares and lay tunnels underneath your tanks! These paradigm-shifting tools will help you realize your creations like never before.

Extend your aquarium skywards with magnificent archways and charming roofs. Themed fences, ropes and glass paneling will take your guests on a journey they'll never forget!

A decorator's dream

With a new selection of paintable facilities, rest assured that meeting your guests' needs won't ruin the aesthetic of your aquarium.

Almost everything in the collection can be painted and with 7 new paints to add to your palette, you'll be spoilt for choice!

While you're on your decorating kick, honor the architects of old with a bumper pack of Greek-themed decorations!

Thinking outside the box!

The Architect's Collection is a celebration of the spaces outside the tanks. With this in mind it comes fully equipped with a new gift shop toy — the adorable Hermit Crab — as well as two customer-focused accessories.

Build it your way

All features within the Architect's Collection integrate seamlessly into the sandbox experience. Furthermore, additional sandbox objectives will become available, specifically designed to take advantage of everything the collection has to offer.


Freshwater Frenzy is the first Deluxe Expansion for Megaquarium. It adds a brand new environment for you to explore and master – freshwater!

Your new inhabitants

From the prehistoric Arapaima to the infamous Piranha, Freshwater Frenzy is packed full of new species to discover. There are new care requirements to learn and demanding new aquascaping requirements to fulfil. From floating cover to bogwood, providing everything your inhabitants need will challenge even the seasoned curator!

Become a breeder

For the first time in Megaquarium history you will be able to rear baby animals in your aquarium. But make no mistake, fulfilling the unique breeding requirements of each animal is no easy task. Then there’s raising the young themselves, a job fraught with difficulties and requiring your constant attention.

Ready, get set, hybridize!

Some species can even be hybridized. By selective breeding you can create color and pattern combinations that reflect your style.

Introducing pH

If that wasn’t enough, some animals will require you to maintain a specific pH in the tank. Will you satisfy this with clever use of passive sources? Or will you let the machines do the heavy lifting? The choice is yours.

Accessories and posters

Accessories are a brand new tool in your arsenal to optimize your aquarium. Equip them on your staff for powerful bonuses, but choose carefully, only one accessory may be equipped at a time.

Disseminate facts and fun by placing informative posters around your aquarium. Their value relies on the contents of the connected tank so design your exhibits wisely.

Reptiles and new tanks

Reptiles such as turtles and crocs require land as well as water. Thankfully there are new tank designs which fulfil this need.

Meanwhile, tanks with suspended platforms can be used to bridge different areas of your aquarium together, while exciting your guests with a thrilling new perspective!

Freshwater masterclass

Explore everything that freshwater has to offer by completing the Freshwater Frenzy campaign. Each mission will challenge you to make the most of the new additions and explore the game in new ways.


From the creator of Big Pharma comes a brand new economic simulation game. Megaquarium follows in the footsteps of classic theme park management tycoon games and adds an aquatic spin!

A living simulation

Starting with just a few tanks and the most basic of livestock, you’ll grow your aquarium to a thronging metropolis filled with hundreds of guests, tens of staff and a multitude of different aquatic lifeforms, each with their own unique care requirements.

Design your exhibits

Megaquarium features almost 100 different marine species including fish, sharks, crustaceans, corals, jellyfish, other invertebrates and even a turtle! You’ll be spoilt for choice as you design, decorate and populate your tanks.

The right staff for the job

You won’t get far without the right staff. Choose who to hire based on their skills and future potential. Will you train up a team of multi-disciplined staff or a set of super-focussed experts? You’ll have to weigh up the pros and cons of each strategy and work out what is right for your aquarium.

Research new animals and technology

As guests experience your displays you’ll earn points which you can assign to discovering new livestock and equipment. Keep upgrading and expanding your aquarium and work your way up to the most prestigious animals and displays in the aquarium industry.

Manage your finances

The latest fish might look cool, but have you considered its impact on your aquarium’s bottom line. Tricky animals may require new staff to be hired, expensive fish food or supplements and the best tanks are a hefty investment! As aquarium curator you’ll need to master creativity and economics to succeed.

Manage your guests!

Keep your guests happy by providing them with seating, food, drinks and toilet facilities. Then at the end of their visit, direct them through the gift shop to boost your profits!

Curator school

Start your career in the campaign mode where you’ll learn everything you need to know about designing and managing an aquarium. Each of the 10 levels challenges you to build an aquarium with unique gameplay conditions and objectives, while new features and concepts are explained along the way.

Dive into the sandbox

Next explore sandbox mode where, with customisable settings and a random challenge generator, you can find virtually unlimited fish-related gameplay!

Easy to learn, difficult to master

Running an inefficient aquarium is easy. To really thrive and take on the greatest challenges you’ll need a lateral thinking brain and attention to detail. Will you group your animals by food type, water quality or something else entirely? Will you locate your equipment in a centralised hub using pumps or spread them out embracing the zoning system? How will you optimise your layout so that visitors can find your tanks and staff can easily access them?

Every decision you make in Megaquarium has consequences. Your choice of animals, filters, tanks, staff and layout all have subtle and far reaching effects on each other. Experiment, adjust, learn, reapply and most importantly, have fun!