From Monkey Island wiki
Tim Schafer is one of the co-creators of the Monkey Island series, alongside Ron Gilbert and Dave Grossman. He was brought on board to write roughly a third of the plot and dialogue in co-operation between Gilbert and Grossman. Schafer worked on both The Secret of Monkey Island and Monkey Island 2: LeChuck's Revenge.
After graduating from UC Berkeley with a computer science major in 1989, Tim Schafer went to work LucasArts (then called Lucasfilm Games). After play testing the Indiana Jones and the Last Crusade action game and assisting with the NES version of Maniac Mansion, Schafer was assigned as a writer and programmer to the production of The Secret of Monkey Island. Monkey Island is noted for its humourous story, though was originally conceived as having a more serious tone; Schafer and Grossman wrote much humourous placeholder dialog, which persuaded Gilbert to turn it into a comedy. The Secret of Monkey Island became one of the most acclaimed games of its kind. The same team created the sequel, Monkey Island 2: LeChuck's Revenge.
In his first lead role on a game project, Schafer co-designed (with Dave Grossman) Day of the Tentacle, a time-travel comedy adventure loosely based on Maniac Mansion. He later enjoyed success with Full Throttle, which featured the art direction of Larry Ahern and Jonathan Ackley, the project leaders for The Curse of Monkey Island and also lent the verb-coin to that game. He is, however, best known for creating LucasArt's first 3D adventure game, Grim Fandango, which was later used as the basis for Escape from Monkey Island.
Double Fine Productions
He left LucasArts in January 2000 to found Double Fine Productions, where he created the acclaimed platform game Psychonauts. Schafer also worked on a rock'n'roll themed game called Brütal Legend, starring actor Jack Black and several famous rockers. The game is was released in October 2009 for the Playstation 3 and Xbox 360.