Psychonauts is currently free on Humble Store

Need something free for the weekend? Got you covered! Psychonauts is free to grab and own from the Humble Store.

The game was originally released in 2005 and came to Linux much later in a Humble Bundle after Double Fine took back the rights to the game. If you're interested, our contributor Hamish posted a review of it on Linux.

About the game:

A Psychic Odyssey Through the Minds of Misfits, Monsters, and Madmen.

This classic action/adventure platformer from acclaimed developers Double Fine Productions follows the story of a young psychic named Razputin. In his quest to join the Psychonauts--an elite group of international psychic secret agents--he breaks into their secret training facility: Whispering Rock Psychic Summer Camp. But this is no average psychic summer camp! A mysterious villain has kidnapped Raz’s fellow campers and stolen their brains. Now he must use his psychic powers of Telekinesis, Levitation, and most of all his ability to project himself into the minds of others--to find the loose noodles and keep them from falling into the wrong hands. Fight mental demons! Uncover hidden memories! Sort emotional baggage! Explore the fantastic realm of the inner mind! Join the Psychonauts!

Not much to say about it, as this is a quick tip so you don't miss out on a cracking deal. I've never played it myself, but maybe it's time.