Egg hunts (previously known as Egg drops) were special events in which eggs were scattered around one or multiple games which must be found by players. Each egg was different and has a different way to earn it. Egg hunts started in April 2008 and ended in April 2020.
Some eggs would've become limited items, usually if they were the hardest to find, and typically sell at around 200 Robux to 1,500 Robux on the Avatar Shop. 2006, 2007, 2009, and 2011 were the only years to not feature egg hunts or drops until 2021, where the egg hunt was instead replaced by another event.
It was originally believed by players that there would not be an egg hunt for the year 2020 and beyond due to the administrators' announcement of all events being discontinued and replaced with the now discontinued Live-Ops. Despite the announcement, an egg hunt for the year 2020 was confirmed when chewbeccca posted on the Developer Forum looking for games to participate in the event after Live-Ops was presumably discontinued. 
Metaverse Champions was an event released on April 15, 2021 and was the first "egg hunt" to feature such few eggs (just one).
The egg was called the Tiny Egg of Nonexistence. The egg was a troll in Egg Hunt 2008, being the first egg hunt in Roblox. This egg was the last egg in 2021 on Roblox. If you look at the game for Metaverse Champions, you can see a badge with the description being "goodbye." to symbolize egg hunts being removed from Roblox permanently.
|Bluesteel Egg of Genius||This egg was given out to all users who participated in the 2008 RoTris competition by Lenox and achieved a score of 150 or higher on Hard Mode.|
|Wikipedian Egg of Alien Mind Control||This egg was created by Telamon in order to fool players who asked him about how to get the egg.|
|Tiny Egg of Nonexistence||This egg was another egg created by Telamon to fool players who asked him about how to get the egg during the 2008 hunt. But, in 2021, the egg could be obtainable via a secret quest in the Metaverse Champions Hub.|
|Violently Pink Egg of Violent Opinions||This egg was given during the 2010 hunt to players who got an 80-100% voting accuracy in a contest.|
|Duskeye Egg of the Crossroads||It was given out to select users during the 2010 hunt as a prize for receiving a score of 1,650 or higher in the Crossroads Improvement Project.|
|Royal Agate Egg of Beautiful Dreams||This egg was another egg created by Telamon to fool players who asked him about how to get the egg during the 2008 hunt. It was eventually given out during the 2010 hunt as a prize for receiving a certain score in a contest.|
|Arborist's Verdant Egg of Leafyness||This egg was another egg created by Telamon to fool players who asked him about how to get the egg during the 2008 hunt. It was eventually given out during the 2010 hunt as a prize for receiving a certain score in a contest.|
Egg drop gear
- Egg Basket: This item was used in the 2010 Egg Drop. It is given to all Builders Club members. It allowed you to hold unlimited eggs in your inventory. If you didn't have BC, you could only hold 6 unique eggs.
- Eggdentifier 2010: This item was used to tell you how many of what eggs were in the place you were playing.
- Egg Compass: This gear pointed to the rarest egg in the place you were in.
- Bad Bunny: This Gear allowed you to create fake explosive eggs.
- Magic Bunny: This Gear allowed you to jump to great heights.
- Eggphone: This Gear would display a list of all the eggs from Egg Hunt 2020 event as well as a hint to the objectives to get the eggs.