Steal An Egg Hungry Monster Event Guide: Infested Eggs, Monster Chests & Monstrous Egg (2026)
Last updated: 2026-09-12
The Steal An Egg Hungry Monster event guide: where Infested Eggs spawn across seven biomes, how to feed the Hungry Monster for Monster Chests, the full Monster Chest reward rates, and the Monstrous Egg hatch table. Event runs August 29 to September 5, 2026.
What the Hungry Monster event is in Steal An Egg
The Hungry Monster event is a limited-time event added in the Monsters Are Coming update on August 29, 2026. During the event, parasites begin attaching themselves to eggs across the map. You collect those Infested Eggs, bring them to your base, and feed the parasite to the Hungry Monster that stands by the Sell Shop in the safe zone.
Fill the Hunger Monster’s meter to 100% and it rewards you with a Monster Chest. The event window is August 29 to September 5, 2026, so it is a time-limited grind rather than a permanent system. Plan your Infested Egg runs before the window closes.
Where Infested Eggs spawn in Steal An Egg
Infested Eggs can appear in seven biomes during the event. Whenever the eggs reset (about every five minutes) some of the available eggs in those biomes have a chance to become Infested, showing purple parasites sitting on top. The seven affected biomes are:
- Snow
- Volcano
- Abyss Ocean
- Prehistoric
- Cosmic
- Cherry Blossom
- Titan Temple
It does not matter which biome the Infested Egg comes from, since each one contributes the same 20% to the hunger meter. Steal the closest Infested Egg you can reliably return with rather than chasing one in a far biome.
How to earn Monster Chests
Each Infested Egg you feed fills 20% of the Hunger Monster’s hunger meter. Feed five Infested Eggs and you earn one Monster Chest, then the meter resets and you can start filling it again. The Monster Chest carries the following reward rates, per the update patch notes:
| Monster Chest reward | Chance |
|---|---|
| 1.25x Egg Growth (5 minutes) | 43.5% |
| 1.25x Speed (5 minutes) | 30% |
| 2x Treadmill Speed (5 minutes) | 20% |
| Flyswatter | 5% |
| Monstrous Egg | 1.5% |
The most common Monster Chest drop is a short 1.25x Egg Growth boost, while the rarest is the Monstrous Egg at 1.5%. Most rewards are timed multipliers, so open your chest right before a big farming session to make the most of them.
What the Monstrous Egg hatches
The Monstrous Egg is the rarest Monster Chest reward and hatches one of six Monster pets, each with a fixed hatch chance. The six pets and their rates are:
| Monster pet | Rarity | Hatch chance |
|---|---|---|
| Scorpio | Legendary | 39% |
| Froggo | Mythic | 24% |
| Crawler | Cosmic | 18% |
| Crocodon | Secret | 11% |
| Krakenoid | Eternal | 6.5% |
| Dreadscale | Divine | 0.5% |
Scorpio is the most likely hatch at 39% and Dreadscale the rarest at 0.5%, but every Monstrous Egg hatch is a Monster pet. The same six monsters are also in the separate Monster Egg sold in the Robux Store, though that one is a purchase rather than a chest drop.
Hungry Monster event tips in Steal An Egg
Run the event alongside your normal biome loop. Because Infested Eggs show up in the same seven biomes you already farm, grab one on the way back to base instead of making a dedicated trip. Feed the Hungry Monster whenever your meter is close to a multiple of 20% so you never waste a partial fill.
Save Monster Chests for a session where a 2x Treadmill Speed or 1.25x Speed boost actually moves your progress, and treat the Monstrous Egg as a bonus rather than the goal. The full Monster pet roster is on the Steal An Egg pets guide.
Hungry Monster event in the Monsters Are Coming update
The Hungry Monster event shipped as part of the Monsters Are Coming update on August 29, 2026, alongside the Titan Temple biome, the Monster Egg, and the Parasite mutation. The update added no code menu, so the event is reached through normal play rather than a redeem screen.
For the full update breakdown see the Monsters Are Coming update guide, and for the Parasite mutation itself see the mutations guide.
The Hungry Monster event window, the seven Infested Egg biomes, the Monster Chest reward rates, and the Monstrous Egg hatch chances are taken from the Monsters Are Coming update patch notes (August 29, 2026). Reward rates and hatch chances are documented game data, not invented numbers. The event is time-limited and may end after September 5, 2026.
Steal An Egg Hungry Monster Event — FAQ
What is the Hungry Monster event in Steal An Egg?+
The Hungry Monster event is a limited-time event where parasites attach to eggs across the map and you feed them to the Hungry Monster by the Sell Shop. Filling its hunger meter earns Monster Chests, which can drop the rare Monstrous Egg. The event runs from August 29 to September 5, 2026.
Where do Infested Eggs spawn?+
Infested Eggs can appear in seven biomes during the event: Snow, Volcano, Abyss Ocean, Prehistoric, Cosmic, Cherry Blossom and Titan Temple. Whenever the eggs reset (about every five minutes) a few eggs in those biomes may show purple parasites on top and become Infested.
How many Infested Eggs make one Monster Chest?+
Each Infested Egg fills 20% of the Hungry Monster hunger meter, so you need five Infested Eggs to earn one Monster Chest. It does not matter which biome the Infested Egg came from — every one contributes the same 20%.
What are the Monster Chest reward rates?+
A Monster Chest can give 1.25x Egg Growth for five minutes (43.5%), 1.25x Speed for five minutes (30%), 2x Treadmill Speed for five minutes (20%), a Flyswatter (5%), or the rare Monstrous Egg (1.5%). The rates are per the update patch notes.
What hatches from the Monstrous Egg?+
The Monstrous Egg hatches one of six Monster pets: Scorpio (Legendary, 39%), Froggo (Mythic, 24%), Crawler (Cosmic, 18%), Crocodon (Secret, 11%), Krakenoid (Eternal, 6.5%) and Dreadscale (Divine, 0.5%). Dreadscale is the rarest at half a percent.
Is the Hungry Monster event still running in Steal An Egg?+
The event window is August 29 to September 5, 2026. If today is past September 5 the event has likely ended, so check the in-game event banner before you spend a run farming Infested Eggs. This guide reflects the documented event dates.
