Monster Hunter Tri is an action-RPG in which the player hunts dinosaur-like monsters. Monsters can be carved for items which can be used to upgrade equipment. There are also some mechanics to upgrade the player's village. However, the game centers on monumental fights against boss-sized enemies.
It is a sequel in the established Monster Hunter series. It is the first entry of the series to feature underwater combat. It also comes with a comprehensive multi-player part that works without the Wii's Friend Code system. The multi-player mode allows up to 4 players to team up against the monsters. Communication occurs via Wii Speak or a USB Keyboard.