Andy Helms' latest video-game-themed set for his Dude-a-Day project gives us six great sketches from Double Fine's Psychonauts, depicting the dark platformer's hero and other Whispering Rock Psychic Summer Camp characters in black and green marker.

Past the break, you'll find more a few more illustrations from the cult favorite game, including conspiracy theorist Boyd Cooper and certified dentist/villain Dr. Caligosto Loboto. And if you haven't seen them yet, treat yourselves to the Helms's previous Dude-a-Day sketches for Castle Crashers and Metal Gear Solid.