Mine a Planet pet eggs are the only way to obtain pets, and they drop from specific activities across multiple planets. Each egg tier has a different pet pool and a different Legendary hatch rate. This guide covers every egg tier, the hatch rates, the best farming activities for each one, and the tips that increase your chances of hatching a Legendary pet.
For the broader pet system overview, see our Mine a Planet pets guide. For the pet tier rankings, see our Mine a Planet pet tier list. This principle applies broadly across all progression stages and is one of the most reliable optimization levers in the game.
Pet Egg Tier Overview
There are five pet egg tiers in the game, each with a different pet pool and Legendary hatch rate. The drop rates and hatch rates below are community-tested averages that may shift with future patches. The exact mechanics vary slightly by patch, but the underlying principle remains consistent across all player playstyles.
| Egg Tier | Source | Pet Pool | Legendary Rate |
|---|---|---|---|
| Common Egg | Earth, Mars | Dust Bunny, Rock Mole | 0% |
| Uncommon Egg | Mars, Europa | Iron Pup, Crystal Cub | 2% |
| Rare Egg | Europa, Volcano | Moon Fox, Volcano Phoenix | 5% |
| Epic Egg | Volcano, Nebula | Volcano Phoenix, Astral Cat | 10% |
| Legendary Egg | Nebula, Void | Astral Cat, Cosmic Wolf | 25% |
The Legendary hatch rate scales with the egg tier, and the source planets are progressively higher tier. The Legendary Egg drops only on Nebula and Void, which makes it the rarest and most valuable egg type. Experienced players test this approach across multiple sessions before committing to a long-term strategy based on the outcome.
How to Farm Pet Eggs
The fastest way to farm pet eggs is to break nodes on the highest-tier planet you can access. Higher-tier planets drop higher-tier eggs, and higher-tier eggs have higher Legendary hatch rates. For end-game players, this means farming Nebula (for Epic Eggs) and Void (for Legendary Eggs).
For mid-game players, the optimal egg farming strategy is to alternate between Europa (for Rare Eggs) and Volcano (for Epic Eggs). The Epic Eggs from Volcano have a higher Legendary hatch rate than the Rare Eggs from Europa, so spending more time on Volcano is the better strategy if you have the drill tier.
How Hatch Rates Work
The hatch rate is determined when you open the egg, not when you find the egg. A Common Egg will always hatch into a Common pet (Dust Bunny or Rock Mole), while a Legendary Egg has a 25% chance of hatching into an Astral Cat or Cosmic Wolf.
The hatch animation is purely cosmetic and does not affect the outcome. Each egg tier has a fixed pet pool, and the game rolls the pet type randomly when you open the egg. You can re-open the egg if you do not get the pet you want, but the pet pool is fixed per tier.
Pet Drop Bonus From Reforges and Pets
The pet drop bonus is influenced by several systems in the game. The reforge Rare Drop stat adds +5-10% bonus pet drop chance. The Prestige Shop Rare Drop Chance upgrade adds another +10-15%. The Moon Fox pet adds +15% bonus pet drop chance on Europa. Combined, a fully optimized build can roughly double the pet egg drop rate.
| Source | Bonus Pet Drop Chance |
|---|---|
| Reforge Rare Drop | +5-10% |
| Prestige Shop | +10-15% |
| Moon Fox (Europa) | +15% |
| Combined Max | +30-40% |
Best Pet Combinations for Hatching
The optimal pet combination for hatching is the Moon Fox (slot 1) for the Europa Rare Drop bonus, the Astral Cat (slot 2) for the Drill Speed bonus, the Volcano Phoenix (slot 3) for the Smelt Speed bonus, and the Cosmic Wolf (slot 4) for the XP bonus. This loadout maximizes pet egg drops from Europa while still benefiting from the Smelt Speed and Drill Speed bonuses.
| Slot | Pet | Reason |
|---|---|---|
| 1 | Moon Fox | +15% Rare Drop on Europa |
| 2 | Astral Cat | +Drill Speed |
| 3 | Volcano Phoenix | +Smelt Speed |
| 4 | Cosmic Wolf | +XP Bonus |
How to Get Legendary Pets Faster
The fastest way to get Legendary pets is to buy them from the trade market. Astral Cats and Cosmic Wolves are tradeable, and the prices are typically 5-15 million Drill Pieces for a stock Legendary pet. For players who have the Drill Pieces and want to skip the hatch grind, buying from the trade market is the fastest path.
For players who prefer to hatch their own Legendary pets, the optimal strategy is to farm Legendary Eggs from Void, equip the pet drop bonus pets, and re-open any Legendary Eggs that do not hatch into the pet you want. The expected time to hatch a Legendary pet with this strategy is roughly 50-100 Legendary Eggs, which translates to 10-20 hours of focused Void farming.
Egg Hatching Patience vs Bulk Strategy
There are two schools of thought on egg hatching: patience (hatch eggs one at a time as you accumulate them, so each new pet gets individual attention) and bulk (save up 10-20 eggs and hatch them in a single session to maximize your odds of a rare drop within the same hour). The patience approach is better for new players who want to learn the pet stats system, while the bulk approach is better for veterans who have already mastered the stats and just want to maximize rare pet acquisition rate.
For bulk hatching, the optimal session length is 2-3 hours, which is long enough to hatch 10-20 eggs but short enough that you do not lose focus and accidentally discard a rare-tier pet. For patience hatching, the optimal cadence is to hatch one egg per planet transition, which gives you a steady stream of new pets without overwhelming your inventory.
Hatching Boost Windows
The developer occasionally runs hatching boost weekends where the rare pet drop rate is doubled or tripled for 48-72 hours. These windows are the absolute best time to bulk hatch, because every egg you crack during the boost has 2-3x the normal odds of yielding a rare or legendary pet. Track the developer's social media announcements to know when the next boost is scheduled, and stockpile eggs in the days leading up to it.
Combining a hatching boost with a code redemption that grants bonus eggs is the ultimate stacking strategy, and it is how veterans routinely acquire multiple legendary pets per boost weekend. For the active codes that grant bonus eggs, see our active codes list.
Frequently Asked Questions
What is the Legendary pet hatch rate?
The Legendary Egg hatch rate for Legendary pets is 25%, which is the highest in the game. Epic Eggs have a 10% Legendary hatch rate, Rare Eggs have a 5% rate, and Uncommon Eggs have a 2% rate. This mechanic is important to master because it compounds with every other progression lever in the game economy.
Can I trade pet eggs?
Yes, pet eggs at every tier are tradeable. Common Eggs sell for 500-2,000 Drill Pieces, and Legendary Eggs sell for 1-5 million Drill Pieces. Always verify the trade against the current market rate before confirming, because traders bundle low-value items to mask cost.
Should I save pet eggs for double-reward events?
Yes, the developers occasionally run double-reward events where pet eggs have a 2x hatch rate. Saving your pet eggs for these events roughly halves your expected time to hatch a Legendary pet. Generally yes, but the optimal timing depends on your current resource reserves and your active biome's node HP profile.
What is the rarest pet in the game?
The Cosmic Wolf is the rarest pet in the game because it drops only from Legendary Eggs (25% chance) and has no other source. Most players buy Cosmic Wolves from the trade market. This mechanic is important to master because it compounds with every other progression lever in the game economy.
Can I have multiple Legendary pets?
Yes, the inventory lets you carry multiple Legendary pets simultaneously. Most end-game players carry one of each Legendary pet (Astral Cat + Cosmic Wolf) for the optimal passive bonus spread. Yes, but the optimal approach depends on your current progression stage and your stockpile of supporting materials.
How to Maximize Your Legendary Pet Hatch Rate
Beyond equipping the pet drop bonus pets and farming on Void, there are a few additional optimizations that maximize your Legendary pet hatch rate. The first is to participate in double-hatch events when they occur, which the developers announce in the official Discord. The second is to use a high Damage reforge on your drill, because the Damage stat is multiplicative with the pet drop chance in some versions of the game.
The third optimization is to open all of your pet eggs in a single session rather than spreading them out over time. The hatch rate is determined when you open the egg, not when you find it, so opening multiple eggs in a single session gives you more chances to hatch a Legendary pet without resetting your farming efficiency.
Common Pet Egg Mistakes to Avoid
The most common mistake is to open Common Eggs as soon as you find them, when you should be saving them for double-hatch events. The hatch rate bonus during these events is roughly 2x, which means saving 50 Common Eggs for a double-hatch event yields roughly the same number of pet drops as opening 100 Common Eggs during a normal period.
The second mistake is to sell high-tier eggs on the trade market without first checking whether you can use them yourself. If you are pushing for the Astral Annihilator craft, you will need every Mythic material you can get, and selling pet eggs ties up Drill Pieces that would otherwise fund your crafting pipeline.
Why Pet Eggs Are Worth the Trade Value
Pet eggs have meaningful trade value because they bypass the hatch rate RNG. A player who buys a Legendary Egg for 5 million Drill Pieces saves the time investment of farming and fusing eggs to reach the Legendary tier. For end-game players with Drill Piece reserves, buying eggs is a time-efficient shortcut to acquiring Legendary pets.
The trade value of pet eggs fluctuates with the in-game economy. During double-hatch events, the value of existing pet eggs drops because players are more likely to hatch them rather than sell them. Between events, the value returns to baseline, which is typically 3-5 million Drill Pieces per Legendary Egg.
Trade-Off Between Hatching and Buying Legendary Pets
For most end-game players, the decision between hatching and buying Legendary pets is a tradeoff between time and Drill Pieces. Hatching is free in terms of Drill Pieces but requires hours of focused farming and a healthy dose of RNG luck. Buying is expensive but guarantees the pet immediately.
The decision rule of thumb: if you have more time than Drill Pieces, hatch your own. If you have more Drill Pieces than time, buy from the market. For most working adults with limited playtime, buying Legendary pets is the more practical choice.
How to Identify Fake Pet Listings on the Trade Market
A growing problem on the trade market is fake Legendary pet listings that promise high-stat pets at low prices. These listings are designed to lure buyers into trade scams where they end up giving away valuable items for a worthless pet.
Always verify the pet stats by right-clicking the pet in the trade window and inspecting its actual stats before confirming the trade. If the stats do not match the listing description, cancel immediately and report the seller to the official Discord moderators.
The third mistake is to fuse eggs without first checking the trade market. Sometimes a Rare or Epic Egg is cheaper to buy from the market than to fuse from lower tiers, particularly during sales events when the market is flooded with eggs.