Worm.is: The Game is an incredibly addicting multiplayer game available on the iPhone. In this game, you play as a worm and your goal is to slither around and eat food to grow longer. However, you must also be cautious of other worms who are trying to do the same. If your head collides with another worm, you become food for them. Additionally, you must avoid viruses that can slow you down and absorb your mass.

Worm.is offers three game modes: Free for all, Random Team, and Hunger Games, with the promise of more modes coming soon. You can also create private rooms to play with your friends. The game allows you to cut off other worms to kill them and eat their mass. You can also expel mass to give it to other worms.

Overall, Worm.is: The Game provides a lot of fun and excitement for players looking for a highly addictive multiplayer experience. It is available for free on the iPhone.