Omegalodon is a third-person multiplayer action game where players compete by attacking/defending the city. The Red Team is comprised of police and soldiers armed with an array of military vehicles and explosive weaponry. The Green Team is comprised of Omegalodon, a 100-foot shark monster, and the Enviros, equipped with a healing beam.

The Red Team's objective is to destroy the monster as he marches toward the city center. The police and soldiers must also avoid damaging the city, as EVERY act of destruction heals the monster. Soldiers are equipped with rocket launchers and police with mines.

The Enviros may safely escort the monster by remaining close to him, which automatically heals him. Enviros may also risk abandoning the monster to acquire a vehicle with which to combat the opposing team. In addition to the healing beam, enviros possess a small gun.

Omegalodon's objective is a nuclear containment dome at the city center. Destroying this structure will win the round for the Green Team.

The monster's health drains constantly, and smashing any structure replenishes it. The round will end if the timer reaches zero or the monster is destroyed.

Friendly fire is always on!

The game plays like a backward tower-defense game, but with free-roaming capability and fast-paced, realtime action.