Pets
Introduction
Pets are companion units that follow your miner and grant passive bonuses. They hatch from eggs of different rarity tiers and level up as you play, stacking drill speed, auto-pickup radius, rare drop multipliers, and smelt speed buffs. The tier list below ranks every pet by overall grind value across all five planets. Pets hatch from eggs of varying rarity tiers and follow your miner passively, granting a single permanent bonus that stacks with your drill and Rebirth multipliers. Common Eggs drop from any planet, Rare Eggs from Mars Deep onward, Epic Eggs from Volcano, and Legendary Eggs from Nebula. Anniversary and Halloween events multiply the Legendary Egg drop rate by 3x, so save your longest grind sessions for those windows. The tier list below ranks every pet by overall grind value across all five planets.
Pet Tier Snapshot
| Tier | Pet | Bonus |
|---|---|---|
| S | Astral Cat | Drill speed +25%, rare drop +15% |
| S | Cosmic Wolf | Void Shard +30%, smelt speed +20% |
| A | Volcano Phoenix | Smelt speed x2 at smelter |
| B | Iron Pup | Drill speed +8% permanent |
| C | Dust Bunny | Auto-collects Common ore within 8 studs |
Pet Roster
Astral Cat
Top-tier Legendary pet — combines drill speed and rare drop bonuses for the highest overall grind value. Top-tier Legendary pet — combines drill speed and rare drop bonuses for the highest overall grind value. Astral Cat hatches from Legendary Eggs and grants +25% drill speed plus +15% rare drop rate, stacking with your equipped drill's multiplier. Anniversary and Halloween events multiply the Legendary Egg drop rate by 3x, so save your longest grind sessions for those windows.
Cosmic Wolf
Strong Legendary pet — the only pet with a dedicated Void Shard drop bonus, perfect for Cosmic Core crafting. Strong Legendary pet — the only pet with a dedicated Void Shard drop bonus, perfect for Cosmic Core crafting. Cosmic Wolf hatches from Legendary Eggs and grants +30% Void Shard drops plus +20% smelt speed, making it the best pet for Void biome farming. Pair with the Cosmic Reaper drill for the highest possible Void Shard drop rate in the game.
Volcano Phoenix
Strong Epic pet — doubles smelt speed at the smelter bench, the biggest crafting time-saver in the mid-game. Strong Epic pet — doubles smelt speed at the smelter bench, the biggest crafting time-saver in the mid-game. Volcano Phoenix hatches from Epic Eggs and is the only pet that doubles smelt speed, cutting your smelt batch times in half during long crafting sessions. The Epic Egg drop rate is reasonable on Volcano, so most players hatch one within a week of clearing the biome.
Iron Pup
Reliable Rare pet — the cheapest way to add a permanent drill speed bonus to your grind. Reliable Rare pet — the cheapest way to add a permanent drill speed bonus to your grind. Iron Pup hatches from Rare Eggs and grants +8% permanent drill speed, which stacks with your drill's multiplier. Rare Eggs drop from Mars Deep onward, so most players hatch one during the mid-game. The bonus is small but permanent, making Iron Pup a steady pick for any loadout.
Dust Bunny
Starter Common pet — auto-collects nearby Common ore so you can focus on drilling instead of running around. Starter Common pet — auto-collects nearby Common ore so you can focus on drilling instead of running around. Dust Bunny hatches from Common Eggs and auto-collects Common ore within 8 studs, saving you from running back and forth across the mining field. Common Eggs drop on every planet, so beginners can hatch one within their first hour of grinding.
Core Mechanics
Pets are hatched from eggs of varying rarity tiers and follow your miner passively. Each pet grants a single permanent bonus that stacks with the bonuses from your equipped drill and any active Rebirth multipliers. Pet abilities never expire and remain active across Rebirths, so investing in a Legendary pet pays off indefinitely. Pets are hatched from eggs of varying rarity tiers and follow your miner passively, granting a single permanent bonus that stacks with the bonuses from your equipped drill and any active Rebirth multipliers. Pet abilities never expire and remain active across Rebirths, so investing in a Legendary pet pays off indefinitely. The strongest pets (Astral Cat, Cosmic Wolf) grant bonuses that are unobtainable elsewhere, so hatching one is a major power spike. Anniversary and Halloween events multiply the Legendary Egg drop rate by 3x.
Advantages
Pets add a meaningful bonus layer without complicating the gameplay loop — they just follow you and apply their bonus. The strongest pets (Astral Cat, Cosmic Wolf) grant bonuses that are unobtainable elsewhere, so hatching one is a major power spike. Pet abilities stack additively with drill multipliers, making a Mythril Destroyer + Astral Cat combo the single best endgame setup. Pets add a meaningful bonus layer without complicating the gameplay loop — they just follow you and apply their bonus. The strongest pets (Astral Cat, Cosmic Wolf) grant bonuses that are unobtainable elsewhere, so hatching one is a major power spike. Pet abilities stack additively with drill multipliers, making a Mythril Destroyer + Astral Cat combo the single best endgame setup. Anniversary and Halloween events multiply Legendary Egg drop rates by 3x, so timing your longest grind sessions around those windows pays off.
Challenges
Legendary pets have a very low hatch rate from Legendary Eggs, so most miners will burn dozens of eggs before getting one. Pet bonuses are passive — they do not solve active bottlenecks like smelter queue time, and a player who skips pet hatching entirely will still progress at a reasonable pace. Some pet abilities (like Volcano Phoenix's smelt speed) only matter during long crafting sessions, so they are wasted on short play bursts. Legendary pets have a very low hatch rate from Legendary Eggs, so most miners will burn dozens of eggs before getting one. Pet bonuses are passive — they do not solve active bottlenecks like smelter queue time, and a player who skips pet hatching entirely will still progress at a reasonable pace. Some pet abilities (like Volcano Phoenix's smelt speed) only matter during long crafting sessions, so they are wasted on short play bursts. Time your grinding sessions around events to maximize Legendary hatch rates.
Frequently Asked Questions
What is the best pet in Mine a Planet?+
Do pet abilities stack with drill bonuses?+
How often do eggs drop?+
Quick Tips
Always equip an Epic pet before long mining sessions to double rare drop rates — even a cheap Epic pet pays for itself within one Mars Deep run. Even a cheap Epic pet pays for itself within one Mars Deep run. The Epic Egg drop rate is reasonable on Volcano, so most players hatch one within a week of clearing the biome. Pet bonuses stack additively with your drill's multiplier, so the Mythril Destroyer + Epic pet combo is the single best endgame setup before you hatch a Legendary pet like Astral Cat.
Legendary Egg drop rates spike during anniversary and Halloween events, so save your longest grind sessions for those windows. Anniversary and Halloween events multiply the Legendary Egg drop rate by 3x, so timing your longest grind sessions around those windows is the single biggest pet-hatching optimization. Save your longest sessions for those events, and stockpile Common Eggs in your inventory so you have a steady Legendary Egg supply ready when the drop rate spike hits.
Pet abilities stack additively with drill multipliers, so the Mythril Destroyer + Astral Cat combo is the single best endgame setup. The Mythril Destroyer (x4.5 ore multiplier) + Astral Cat (+25% drill speed, +15% rare drop) combo produces the highest effective ore return in the game. Pet bonuses stack additively with drill multipliers, so the combined setup outscores either buff alone. Anniversary and Halloween events multiply the Legendary Egg drop rate by 3x, so time your longest sessions around those windows.
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