MSQ is a game where you play as Metal Sonic (it features the Sonic cast) as he, at first, tries to find all 7 Emeralds to restore his data banks. But, as you progress through the game, many zany characters will come in, making you do other stuff. There are quite a few secrets to find in the game, most are easy. There is also a second game mode, Multiplayer Mode, although it's easily beaten with only one person.
Legacy Player: The "Play online" link above uses the new Quest Viva WebPlayer, which is currently in Beta. In case of issues,
you can try the old WebPlayer.
In this game (which is totally AWWESOME), you play as Metal Sonic and go through a quest uncovering secrets and cool stuff. I love this game and I hope everyone will too!