Currently 12, (not counting Metroid Prime: Trilogy and Zero Mission), and one unreleased, which is Metroid: Other M (making number 12). The chronological order of the games are: Metroid/Metroid: Zero Mission. (Zero Mission was a remake of the original Metroid) Metroid Prime/ Metroid Prime Pinball Metroid Prime: Hunters Metroid Prime 2: Echoes Metroid Prime 3: Corruption Metroid II: Return of Samus Super Metroid Metroid: Other M Metroid: Fusion *Note that these are NOT listed by release dates*
Metroid Prime 2 Echoes - 2004 VG was released on: USA: 15 November 2004 (Gamecube version)
Cinematech - 2002 Metroid Prime Hunters 5-8 was released on: USA: 13 March 2006
Metroid Prime Hunters - 2006 VG was released on: Japan: 20 March 2006 UK: 20 March 2006 USA: 20 March 2006
Pinball Raven - 2011 was released on: USA: August 2011
Video Pinball - 1977 VG was released on: USA: 1977
Pinball Fantasies - 1992 VG was released on: USA: 1992
Video Pinball - 1979 VG was released on: USA: February 1979
Ultimate Pinball - 2002 VG was released on: USA: 2002 (PC version)
Hands on History - 2001 Pinball was released on: USA: 2 October 2004
Marvel Pinball - 2010 VG was released on: USA: 15 December 2010
The Pinball Arcade - 2012 VG was released on: USA: 9 February 2012