Meteos Online (メテオスオンライン) was revealed at Tokyo Game Show 2006 at the NHN Japan booth, where Angel Love Online would also be revealed. Gameplay & avatar customization was shown at said event & not much information about the release date was given, as the speakers for NHN & Q Entertainment said, "We hope to launch it by 2006."

On October 13, 2006, applications for a closed beta test for Meteos Online started. Applications ended two days later on October 15. The closed beta test went from October 16th to 22nd and only 1,000 players would be able to join. Two modes were available:

  • "Team Battle": 3v3--last standing player(s) on one or the other team wins
  • "Battle Royale": free-for-all basically
A open beta for Meteos Online started a month later on November 9, 2006, which of course allowed anyone to join. New planets, items and game improvemenets from the past beta test were added.

On November 22, 2006, Meteos Online would see it's public release. Bavoom was one of the first planets to be added after the open beta.
Unlike other Meteos titles, Meteos Online would see a very different approach to it's gameplay & multiplayer features. One of the most important things gameplay-wise was the ability to move Meteo--the blocks that appear onto a player's board--using the WASD keys. When a Meteo is selected and the user were to press either movement key, the Meteo would be moved to one end of the board depending on which key is pressed. (For example, W would move a Meteo to the very top of the board. D would move a Meteo to the very right of the board.)
Meteos Online would also allow for players to move Meteo sideways instead of the usual up & down movements, adding onto the craziness of the addition of WASD movement.
Another feature Meteos Online would first introduce to the Meteos-series is in-game power-ups. These power-ups would be used in-match to disturb a opponent's board--visually or by affecting the board in someway, or assist the player's board, either by clearing all Meteo on screen or healing the player.

Two days later, the Metegacha was added. Players would be tasked with collecting a combo of Hevendors to get rarer items depending on the combo count. While building your Hevendor combo, more planets would appear on screen. Each match of the Metegacha would be 300 points, which were purchased with real money. From research, it seems as if no planets could be obtained from the Metegacha, only avatar customization items that were never listed on the avatar store or were temporarily listed.

As Meteos Online continued, in-game events would be created, adding new planets & items to be purchased. One of these events would see a annoucement about Meteos Online's very own idol group?! New planets & items would added outside of events what was almost very week.

On July 7, 2007, the Meteos Online website would be updated with a notice from the developers that the game would be shutdown on October 31, 2007--a month before the game's public release. Purchase of in-game points would be disabled on August 31, 2007.

Since then, the only accessible content of Meteos Online would be archives of the game's site, game news articles, and gameplay footage from sites such as Nico Nico Douga & YouTube. No game client or server files were made publicly available after the game's shutdown.