Steal an Egg Fusion Guide: How the Fuse Machine Works

Overview

The Fuse Machine in Steal an Egg lets you merge three copies of the same pet into a single upgraded version. The process is completely free, has no cooldown, and happens instantly at your base. Because the machine permanently consumes all three input pets, it works best for clearing low-income duplicates or mid-tier pets rather than your top earners. Used correctly, fusion consolidates base space while guaranteeing an output that earns equal to or more than the combined money per second of the pets you sacrifice.

How the Fuse Machine Works

Located at your personal base near the pen and treadmill, the Fuse Machine is available from the start with no unlock requirements. The system is strictly species-locked: you must provide exactly three identical pets to trigger a fusion. Mixing different pet types or using fewer than three copies will cause the machine to reject the attempt. There are no premium currency costs or waiting periods attached to the feature, making it a purely mechanical tool for managing duplicate hatches. Collecting three identical pets is uncommon early on, so the machine typically becomes practical once you have hatched long enough to accumulate repeat high-value species.

Step-by-Step Fusion Process

To complete a fusion, follow these exact steps: 1. Pick up the three matching pets from your base so you are carrying all three simultaneously. 2. Walk to the Fuse Machine and place each pet into the available slots. The interface will automatically validate the set and reject any mismatched species. 3. Press the Fuse button. The machine processes the merge almost instantly with no loading screen or timer. 4. Collect the resulting pet once the three originals disappear. Immediately check the new pet’s money-per-second stat to confirm whether your total income improved.

Understanding Fusion Results & Mutations

A fused pet will never generate less income than the three pets that went into it. At minimum, the output matches the combined earnings of the inputs, and higher-rarity pets used as fuel shift the odds toward a stronger result. The machine also carries a random chance to produce a mutated pet, which can generate several times more cash than a standard version. That roll is not guaranteed on any single attempt.

Mutation handling requires careful planning. Feeding a mutated pet into the machine as an input generally does not pass its mutation to the fused result, making plain unmutated duplicates the safest choice. However, Eldorado reports that if all three input pets share the exact same mutation, the fused pet will retain it and has a chance to hatch larger. IGN also notes that the Fuse Machine can be used to increase a pet’s chances of rolling Silver, Gold, or Rainbow mutations, provided you have at least three of the same base pet.

When to Fuse vs. When to Keep Pets Separate

Fusion is a one-way, irreversible trade. Because the three inputs are permanently destroyed, strategic placement matters more than raw convenience. The machine is most effective for clearing base clutter from low-income duplicates or mid-tier pets that are slowing down your layout efficiency. Conversely, your highest-earning pets usually generate more money left unfused and placed separately in the base. Always compare the fused pet’s money-per-second against the three originals before committing to the merge to avoid the common mistake of sacrificing your best earners.

Important Distinctions

Do not confuse the Fuse Machine with the Rift Machine located in the lobby. The Rift Machine is a separate event feature that sacrifices three specific requested pets for a chance at a Riftborn, Riftbeasts, or Shattered Rift Egg. The Fuse Machine operates independently at your base, focuses exclusively on merging identical pets, and does not participate in Rift event odds or mechanics.