Developer BIO

There is no biography on file for this developer.

Also Known As

• Mark Siebert

Websites

• 1999 Interview -- on Adventure Classic Gaming
• Mark Seibert -- his listing on the iMDb
• Mark Seibert's Website -- Personal Homepage

Command & Conquer 3: Kane's Wrath (2008), Electronic Arts, Inc.
Quest for Glory II: Trial by Fire (2008),
A Force More Powerful: The Game of Nonviolent Strategy (2006), International Center on Nonviolent Conflict, York Zimmerman Inc.
King's Quest Collection (2006), Sierra Entertainment, Inc.
The Lord of the Rings: The Battle for Middle-Earth II - The Rise of the Witch-King (2006), Electronic Arts, Inc.
Arcanum: Of Steamworks & Magick Obscura (2001), Sierra On-Line, Inc.
Throne of Darkness (2001), Sierra On-Line, Inc.
SWAT 3: Close Quarters Battle (1999), Sierra On-Line, Inc.
King's Quest: Mask of Eternity (1998), Sierra On-Line, Inc.
Leisure Suit Larry's Casino (1998), Sierra On-Line, Inc.
King's Quest: Collection Series (1997), Sierra On-Line, Inc.
Shivers 2: Harvest of Souls (1997), Sierra On-Line, Inc.
Leisure Suit Larry: Love for Sail! (1996), Sierra On-Line, Inc.
Mixed-Up Mother Goose Deluxe (1995), Sierra On-Line, Inc.
Roberta Williams' Phantasmagoria (1995), Sierra On-Line, Inc.
Torin's Passage (1995), Sierra On-Line, Inc.
King's Quest (Collector's Edition) (1994), Sierra On-Line, Inc.
Outpost (1994), Sierra On-Line, Inc.
Roberta Williams' King's Quest VII: The Princeless Bride (1994), Sierra On-Line, Inc.
Crazy Nick's Picks: King Graham's Board Game Challenge (1993), Sierra On-Line, Inc.
Gabriel Knight: Sins of the Fathers (1993), Sierra On-Line, Inc.
King's Quest VI: Heir Today, Gone Tomorrow (1993), Sierra On-Line, Inc.
Pepper's Adventures in Time (1993), Sierra On-Line, Inc.
Slater & Charlie Go Camping (1993), Sierra On-Line, Inc.
Take a Break! Pinball (1993), Sierra On-Line, Inc.
The Dagger of Amon Ra (1992), Sierra On-Line, Inc.
Jones in the Fast Lane (Enhanced CDROM version) (1992), Sierra On-Line, Inc.
Police Quest: In Pursuit of the Death Angel (1992), Sierra On-Line, Inc.
Quest for Glory III: Wages of War (1992), Sierra On-Line, Inc.
Quest for Glory I: So You Want To Be A Hero (1992), Sierra On-Line, Inc.
Roberta Williams' Mixed-Up Mother Goose (1992), Sierra On-Line, Inc.
Castle of Dr. Brain (1991), Sierra On-Line, Inc.
Conquests of the Longbow: The Legend of Robin Hood (1991), Sierra On-Line, Inc.
EcoQuest: The Search for Cetus (1991), Sierra On-Line, Inc.
Hoyle Official Book of Games: Volume 3 (1991), Sierra On-Line, Inc.
Leisure Suit Larry 1: In the Land of the Lounge Lizards (1991), Sierra On-Line, Inc.
Leisure Suit Larry 5: Passionate Patti Does a Little Undercover Work (1991), Sierra On-Line, Inc.
Mixed-Up Fairy Tales (1991), Sierra On-Line, Inc.
Police Quest 3: The Kindred (1991), Sierra On-Line, Inc.
Space Quest I: Roger Wilco in the Sarien Encounter (1991), Sierra On-Line, Inc.
Space Quest IV: Roger Wilco and the Time Rippers (1991), Sierra On-Line, Inc.
Conquests of Camelot: The Search for the Grail (1990), Sierra On-Line, Inc.
King's Quest V: Absence Makes the Heart Go Yonder! (1990), Sierra On-Line, Inc.
Oil's Well (1990), Sierra On-Line, Inc.
Quest for Glory II: Trial by Fire (1990), Sierra On-Line, Inc.
Codename: ICEMAN (1989), Sierra On-Line, Inc.
Hero's Quest: So You Want To Be A Hero (1989), Sierra On-Line, Inc.
Leisure Suit Larry III: Passionate Patti in Pursuit of the Pulsating Pectorals (1989), Sierra On-Line, Inc.
Space Quest III: The Pirates of Pestulon (1989), Sierra On-Line, Inc.
Police Quest 2: The Vengeance (1988), Sierra On-Line, Inc.
Silpheed (1988), Sierra On-Line, Inc.