Acyd.io is a cool MMO game where you will start with a small moon. Roam around the playing field and compete with other opponents to dominate the top spot and become the biggest character. It’s not easy to move. You need to release the current mass to thrust in the opposite direction. So, boosting downwards will shoot you upwards. To grow in size quickly, try to consume food like stars and the energy that the other people drop off. Be careful!