Faunasphere is all about protecting the environment and destroying pollution while evolving your fauna -- animals with specific skills that will aid you in completing quests in this scientifically advanced world. Some fauna can dig, others can swim, and others can track scents and more. Fauna can also be bred as well, letting you create new species of animals while increasing their stats.
The flash based MMO also includes the ability to create your own world for your fauna to live in, awarding you items as you complete quests and level up. It's easy to pick up and play, and the animations are pretty cute as well. It's also free... did we mention that? Well, we did now. Give it a whirl, as it's a great MMO for when you're on the go and can't be bothered to install a big game.