Donnette Ruth Thayer is a vocalist, guitarist, and songwriter most active in the 1980s and early 1990s indie rock scenes of Northern California. Thayer was a member of the band Game Theory, and later formed Hex with Steve Kilbey of The Church.

Game Theory was an American power pop band, founded in 1982 by singer/songwriter Scott Miller, combining melodic jangle pop with dense experimental production and hyperliterate lyrics. MTV described their sound as "still visceral and vital" in 2013, with records "full of sweetly psychedelic-tinged, appealingly idiosyncratic gems" that continued "influencing a new generation of indie artists." Between 1982 and 1990, Game Theory released five studio albums and two EPs, which had long been out of print until 2014, when Omnivore Recordings began a series of remastered reissues of the entire Game Theory catalog. Miller's posthumously completed Game Theory album, Supercalifragile, was released in August 2017 in a limited first pressing.