Make a Roblox pet game, from eggs to a complete index
Pets are the engine behind Roblox's biggest simulators: you open an egg, hope for the rare one, fuse, trade, complete the index. The genre is a goal machine, and every piece must be tuned so the urge to open one more egg never fades. Here are its systems, and the prompt to give Builblox to build it inside your Roblox Studio.
Why pets keep players
An egg is a promise: the player knows the rates, sees the rare creature in the index, and every opening is a small honest lottery. Pets then serve a purpose, they follow the player, collect or multiply, so the rare one is not just a trophy. Fusion gives duplicates a use, trading creates a player economy, and the index gives a long-term goal: own them all.
Always show the rates, and keep one rarity truly rare: that is the one people show in videos.
The systems players expect
These six parts make a complete pet game. Find them in the plan before building.
- Eggs by zone or price, with rarities and displayed rates.
- Pets that follow the player, with a multiplier or an ability.
- A pet inventory, equipped slots, an index of everything that exists.
- Fusion: duplicates give a higher-tier pet.
- Player-to-player trading with confirmation on both sides.
- DataStore saves of pets, slots and the index.
The full prompt to give Builblox
Write the rates and egg prices down: those are the numbers players will look at first. Copy this prompt and change the creatures.
Build a pet game with eggs to open and coins to collect. Core loop: the player collects coins, buys eggs, gets pets that collect alongside them, fuses duplicates, trades with others and completes the index. Systems: - 3 eggs at 100, 2,500 and 50,000 coins, each with 6 pets and 5 rarities (Common 60%, Rare 25%, Epic 10%, Legendary 4%, Mythic 1%), rates shown on the egg - A 3-second hatching animation with a special effect for Legendary and Mythic - Pets that float after the player and collect nearby coins, with a multiplier per rarity; 3 pets equipped at the start - A pet inventory with equip, unequip, and fusion: 3 identical pets give a Golden version with double the multiplier - Player-to-player trading: offer, preview on both sides, mandatory confirmation from both - An index showing every pet, greyed out until owned, with a bonus for each completed egg - Coins spawning in 3 zones, each richer than the last Progression: coins, pets, slots and index saved with DataStore, with a leaderboard of Mythic pets owned. Monetisation: gamepass for an extra pet slot and triple hatching, developer products for coins and an exclusive egg.
Iterating in the chat
Pets are tuned on rates and prices. Open thirty eggs, look at what comes out, then ask in the chat: "set Mythic to 0.5%", "the second egg costs 1,500", "add a fourth egg in the Space zone with 6 new pets". Builblox adds to the existing tables without redoing the other eggs, and the index updates. A failed step is undone with Ctrl+Z.
Monetising your pet game
Pets are Roblox's most profitable genre, and also the one where trust matters most: always show the rates, including for paid eggs. What sells: pet slots, triple hatching, auto-hatch, exclusive eggs, exclusive pets visible to everyone, and developer products for coins. Builblox writes the shop and its server check; you create the gamepasses and products in the Roblox Creator Dashboard and paste their ids.
Frequently asked questions
What do Builblox-built pets look like?
Simple creatures assembled from parts, named and animated, placed in your place. For more detailed pets, import your models or use Builblox's 3D Models workshop, on the Pro and Studio plans, then ask the AI to wire them to the eggs.
Is trading between players safe?
Ask for confirmation on both sides and a delay before validation: Builblox writes the trade server-side, which checks that each player actually owns what they offer before moving anything.
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