It's basically a third person hunting game. With giant monsters.

Your goal is to get gud and kill the biggest baddist monsters in the land. While getting up to that point you can make better and unique equipment from the monsters you've slain. There's item crafting too, from basic health items to different types of bullets to bait and even traps. You can also buy most of the stuff too. There a ton of armor and weapon types to learn how to use.

All the animals in the game have their own "routine", seasons and parts of the landscape they'll be in and travel around. Learning thier moves and how to kill them is the main chunk of the gameplay.

If any of that sounds interesting I'd check it out. Each game has different weapon types in it. I've played Tri and I think one on PSP.