Emerald Island (lost environmental massively multiplayer online game; 2008-2009)
Emerald Island was an environmental themed MMO created by Fluid Entertainment Inc.
The game was launched on November 3rd, 2008, and ran until late 2009. The tone and gameplay was designed for players around 6-12 years old.  The game supposedly had around $3.2 million in funding through Trinity Ventures  Other than this, however, very little is known about the game's development. Most likely due to the fact it only lasted for about a year. The reason as to why the game was shut down being that Fluid Entertainment was sold off to another company. 
Both the original websites for Emerald Island and Fluid Entertainment Inc have since gone defunct. With Emerald Island's domain now being owned by an identically named resort  and Fluid's only showing an error message.
It is currently unknown whether or not any assets from the game survive today.
The gameplay was similar to other family-friendly MMOs such as Club Penguin or Animal Jam. Where the player could create an original avatar and explore Emerald Island, which was located on the fictional planet of Viridis.
The goal of the game was to save Emerald Island from the destructive forces of Captain Blunderbore and his gang of "Pirats", who have already destroyed seven out of the eight islands on Viridis. 
The player could roam freely around the island, plant various plants and trees to help keep the island green, play an assortment of mini-games, and interact with other players (who are referred to as "Seedizens" within the game's universe). Players could also cultivate their own garden, which could help them earn in-game currency by harvesting and selling the items grown within their garden. 
- Fluid Entertainment's archived website
- The game's press kit
- IGN'S article talking about the game
- Press Release
- Trinity Venture's investment