The whole system feels more akin to an actual fighting game than an action platformer.
Psychonauts is a 3D platformer at its core, but its gameplay will actually be quite expansive.
This adds a very interesting dynamic to the gameplay and a completely novel way to play an otherwise standard Mario side-scrolling platformer.
Super Mario 64, released on the Nintendo 64, was the first 3rd person platformer starring the plumber.
Cave Story is on the list of freeware video games because this platformer is freeware for PCs despite being available for Wii Points via WiiWare.