Mike Morasky (born June 14, 1964) is an American composer, visual effects artist, director and programmer.

He composed the scores for the Valve games Team Fortress 2, the Left 4 Dead series, Portal 2, Counter-Strike: Global Offensive, Half-Life: Alyx and Counter-Strike 2.

He worked on visual effects for the Lord of the Rings and Matrix films, and founded the underground art bands Steel Pole Bath Tub, Milk Cult and DUH.

For Valve, Morasky composed the music for Team Fortress 2, Portal (with Kelly Bailey), Left 4 Dead, Left 4 Dead 2 (including composing and playing the guitar, keyboard and bass for the fictional hard rock band Midnight Riders), Portal 2, Counter-Strike: Global Offensive, Half-Life: Alyx, and Counter-Strike 2[1] He also worked as a senior visual effects artist and technical director on The Lord of the Rings and The Matrix film trilogies.

Morasky was part of the now-defunct hardcore punk/noise rock band Steel Pole Bath Tub, which he founded in 1986 with Dale Flattum.