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Game guide
Build a Zoo Guide: First steps when you start
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About
OverviewBuild a Zoo is a Roblox simulator where you hatch animals from eggs, place them to earn money, and grow your zoo over time. This guide covers the core loop for new players, how to grow your income, what the latest update added, and how to redeem codes.
What is on this page
Contents
01
First steps when you start
Step
02
The core income loop
Tips
03
Live and upcoming events
Events
04
Mutations and egg quality
Tips
05
Big Pets, Big Fish, and the Halloween event
Summary
06
Big animals and fish — separate systems
Step
07
How to redeem a code
Step
08
Working codes
Codes
09
What to check when progress feels stuck
Check
10
Staying safe while you play
Warn
11
Glossary
Words
12
Common questions
FAQ
01
First steps when you start
Step
In short
Finishing the tutorial before anything else unlocks codes and the shop.
When you first load in, the tutorial walks you through the core loop. Do not skip it — the code redemption system stays locked until you complete it. Once it is done, the shop and code entry open up, and you can start collecting free rewards immediately.
- Finish the tutorial everything else, including codes and the shop, unlocks after this.
- Buy an egg from the conveyor pick one you can afford with your starting money.
- Place the egg on your land buying it is not enough; you must set it down on an empty plot and wait for it to hatch.
- Collect your income walk up to the hatched animal to pick up the money it has accumulated.
- Spend your earnings to expand space more room means more animals and a faster income.
- Redeem any available codes tickets, eggs, and pets are waiting for you in the shop.
MetaNew Player Survey
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02
The core income loop
TipsIn short
Packing your base with animals and keeping that cycle running is the fastest way to build steady income.
Every empty placement slot is money you are not earning. Once your income is stable, you have a much safer foundation from which to chase rarer eggs and upgrades.
Tips worth knowing
- Never let a placement slot sit empty — fill it with whatever egg you can currently afford.
- Walk the zoo regularly to collect income; animals stop paying out until you pick it up.
- Expand your land with the hammer tool as soon as you run out of space for new eggs.
- Upgrade your conveyor to unlock better eggs and income bonuses, then press Equip — buying it without equipping it does nothing.
- Try the Conveyor Egg — new pets are added to it regularly, so it keeps rewarding you over time.
- Explore the whole map — secret pets are hidden in various spots and finding them expands your collection.
03 Live and upcoming events
Events
Events running now or coming soon. They have fixed dates, so check them first.
Live now
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04
Mutations and egg quality
Tips
Eggs can carry mutations such as Gold, and any animal hatched from them inherits that mutation. Mutations affect both the income the animal generates and the amount you receive if you sell it — not just its appearance. Before selling a group of animals, check their income figures and clear out the lowest earners first.
Tips worth knowing
- Mutated eggs cost more, so make sure you can still afford your next purchase before buying one.
- If your collection is still small, standard eggs that build animal count are a perfectly solid approach.
- Compare income numbers before selling — a mutated animal of the same species earns more than an unmutated one.
- The current season includes one exclusive animal, and the new 3-Season Loyalty Track unlocks an exclusive reward for reaching Level 60 in three consecutive seasons.
05
Big Pets, Big Fish, and the Halloween event
Summary
In short
The latest update raised level caps for both Big Pets and Big Fish, added a new Skin Fruit for Big Fish, brought back the Halloween event, and introduced a new Premium Egg.
Update 80 touched several systems at once. Check each one so you are not leaving progress on the table.
- Big Pet level cap raised by 10 levels, giving you more room to grow their power.
- Big Fish level cap also raised by 10 levels in the same update.
- Skin Fruit a new item that lets you give your Big Fish a fresh look.
- Halloween Weather the classic seasonal weather event has returned.
- Halloween Skybox obtain it twice to upgrade it to Level 2, which boosts income for all Halloween Pets by 60%.
- New Premium Egg available in the shop now, containing five new pets to hatch and collect.
06
Big animals and fish — separate systems
Step
In short
Big Pets and fish each use their own dedicated areas, so unlock the right spot before you try to place them.
Big animals are raised on a special platform with food from the Food shop, and fish are caught at the fishing area and placed in a pond — not on land. Unlocking the correct area first saves a lot of confusion.
- Unlock the Big Pet platform once open, the Food shop becomes available and you can start feeding your Big Pet to grow it.
- Buy food and feed your Big Pet it grows through feeding, not hatching.
- Unlock the fishing area find it past the conveyor, then equip a rod and bait.
- Cast your line and fill the gauge tap or click repeatedly when an egg bites until the gauge hits 100%.
- Place the fish egg in the pond land plots will not accept it; only pond slots work.
07
How to redeem a code
StepIn short
Codes go in the Shop screen, and you need a completed tutorial before the entry box appears.
Each code can only be used once per account, and codes expire, so enter them as soon as you find them. Double-check every character before hitting Redeem — capitalization matters. Rewards such as tickets, eggs, and pets land in your account instantly.
- Open Build a Zoo on Roblox you must be in the game for any of this to work.
- Click Shop in the left-side menu this opens the shop screen.
- Scroll down to the Enter Code field it appears toward the bottom of the shop.
- Type the code exactly, then press Redeem one wrong character is enough to make it fail.
- Collect your reward tickets, eggs, or pets are added to your account right away.
08 Working codes
Codes
ZOOOPTIMIZE2026
UPD79REWARD7KQ
UPDATE76A1B2C3D
ZooFarmers
09
What to check when progress feels stuck
Check
In short
Most income problems come down to empty placement space, uncollected income, or neglected Big Pet and Big Fish levels.
Before you decide you need to spend anything, run through this list. The most common causes of slow progress are things you can fix for free.
- Is every placement slot filled? Empty slots are income you are leaving on the table.
- Have you collected your income recently? Animals hold earnings until you walk up and pick them up.
- Is your conveyor equipped? Buying an upgrade without pressing Equip means the new eggs will not appear.
- Have you been leveling your Big Pet and Big Fish? Both level caps were raised by 10 in the latest update.
- Have you explored every corner of the map? Secret pets are easy to miss.
- Are there codes you have not entered yet? Free tickets and eggs from codes can give your zoo a quick boost.
10
Staying safe while you play
WarnIn short
Cheat tools and account sharing both risk getting your account banned, so stick to official methods only.
Build a Zoo is fully playable without spending Robux, so there is no real reason to look for shortcuts that break the rules. Keeping your account information private and sourcing codes only from trusted places protects everything you have built.
Worth watching out for
Never use cheat tools or modified clients
they can result in a permanent account ban.
Do not share your password or account with anyone
this puts all your progress at risk.
Do not open codes or links sent by strangers
phishing attempts do exist.
Talk to a parent or guardian before making any Robux purchases
the game is enjoyable without spending anything.
Glossary
Glossary- Conveyor
- The device that streams purchasable eggs past your base; upgrading it and pressing Equip changes which eggs appear and adds an income bonus.
- Conveyor Egg
- An egg available in the shop that is updated regularly with new pets.
- Prismatic Egg
- A high-rarity egg that occasionally becomes available through codes and produces rare pets.
- Premium Egg
- A shop egg introduced in Update 80 containing five new pets to hatch and collect.
- Big Pet
- A larger pet type raised on a dedicated platform by feeding it, with a level cap that was raised by 10 levels in Update 80.
- Big Fish
- A large fish raised in a pond after being caught at the fishing area; its level cap was also raised by 10 in Update 80.
- Skin Fruit
- An item added in Update 80 that changes the appearance of your Big Fish.
- Mini Pet
- A small pet evolved from a regular pet using Energy Cells; equipped on your shoulders or head to boost Movement Speed and Jump Height.
- Secret Pet
- A pet hidden somewhere on the map that you find through exploration rather than hatching a shop egg.
- Energy Cell
- An item purchased from the Diamond Shop and used to evolve regular pets into Mini Pets.
- Mutation
- A special property, such as Gold, that can appear on an egg and carries over to the hatched animal, affecting its income and sell value.
- Ticket
- An in-game currency obtainable through codes and exchangeable for various items.
- Equip
- The button you must press after buying a conveyor upgrade for it to take effect; Owned means you own it, not that it is active.
- Owned
- A label showing you have purchased an item, separate from equipping it — you still need to press Equip.
- Redeem
- The action of entering a code in the Shop screen to claim its reward.
- RNG
- Stands for random number generation; it determines which pet you hatch from an egg and whether a mutation appears.
- Pity System
- A mechanic on the Premium Egg that guarantees a rare mutation after a certain number of purchases.
Common questions
FAQI bought an egg but no new animal appeared — what went wrong?
Buying an egg does not place it automatically. You need to carry it to an empty spot on your land and set it down, then wait for it to hatch. Once the animal appears, walk up to it to collect the income it has built up.
I bought a conveyor upgrade but nothing changed.
After purchasing, open the conveyor upgrade screen and press the Equip button. The label Owned only means you have bought it — the upgrade does not activate until you equip it.
Why won't my code work?
First, confirm that you have completed the tutorial, since the code entry box is locked until then. If the tutorial is done, retype the code one character at a time — capitalization matters and a single wrong letter will cause it to fail.
I tried to place a fish egg on my land but it won't go down.
Fish eggs can only be placed in pond slots, not on regular land. Unlock the fishing area and the pond first, then place the egg there and wait for it to hatch.
Do I earn money while the game is closed?
Yes, offline income accumulates while you are away. When you log back in, a screen shows what you earned during that time.
Can you enjoy this game without spending Robux?
Yes. Placing animals earns money automatically, so steady play grows your zoo without any purchases. Codes also hand out free eggs, pets, and tickets, and the site currently tracks 18 working codes.
Updated Oct 24, 2026
Game updates can change what is on this page. If you spot something, get in touch and let us know.
Game updates can change what is on this page. If you spot something, get in touch and let us know.
