Pets
- 1 in 364KOperating SystemSecret I
- 100%Prehistoric MonkeyCommon
Limited
The Glitched Egg stands on Medieval Island and costs 12.5Qi Rift Coins a hatch. It is limited: the game ends it on 21 November 2026 at 10:00 UTC. Every hatch is a 
Prehistoric Monkey unless it rolls Operating System.
Luck tiers
Your chance at Operating System improves with the number of Glitched Eggs you have hatched. A new tier unlocks at each threshold and applies to every hatch after it.
| Tier | From | Operating System | Luck |
|---|---|---|---|
| 1 | Your first hatch | 1 in 364,000 | 1x |
| 2 | 14,000 hatches | 1 in 143,000 | 2.5x |
| 3 | 30,000 hatches | 1 in 59,800 | 6.1x |
| 4 | 46,000 hatches | 1 in 24,700 | 14.7x |
These are base odds per hatch, before any luck boosts.
Evolving Operating System
Operating System is the first pet of a chain of four. Three copies of one stage evolve into one copy of the next, of the same tier: three Golden Operating System make one Golden Operating System Evo. Evolving is instant.
| Pet | Rarity | Made from | Operating Systems in total |
|---|---|---|---|
 | Secret I | Hatched from this egg | 1 |
 | Secret II | 3 Operating System | 3 |
 | Secret III | 3  Operating System Evo | 9 |
 | Secret X | 3  Operating System Evo 2 | 27 |
Locked copies can be used. Equipped copies can be used after a confirmation. Frozen copies and a copy that is being enchanted are left out. The game spends unequipped, unlocked copies with no mutation, enchant or signature first, lowest level first.
Premium Glitched Egg
The 
Premium Glitched Egg is the Robux version, sold in the Store. It also gives Operating System, at much better odds. See its page.