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Harry Teasley

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Harry Teasley
Harry Teasley 25th.jpg
Biographical information
Place of birth


  • Game Designer
  • Level Designer
  • Artist
Time period

October 1996 – July 2002[2]



Harry Teasley is an artist and designer who worked at Valve.


Teasley has been working in the gaming industry since 1991. He joined Valve in October 1996. He was involved in the initial design and subsequent creation of Half-Life as an artist and game designer. His work included story design, initial character concept creation, locale concept design, texture painting, and level design. After the launch of Half-Life, he worked on other Valve titles as an artist, worked with third-party content developers, and acted as a producer on Half-Life: Opposing Force.[2] He worked with Ken Birdwell to put the Half-Life SDK together.[4] He studied at Maryland Institute College of Art, and graduated with a degree in Bachelor of Fine Arts and Fine Art Drawing.[5] He is married to Yatsze Mark, who also worked on Half-Life as an artist.[1]


Teasley's surname appears in Half-Life as an Easter egg in the Anomalous Materials Laboratory on a locker. A photo of his daughter, Isabel, can be found in Gordon Freeman's locker in the same room. According to Teasley, he originally placed this photo in a completely different area, on the broken desk of a ruined office in another map, and had initially put a pin-up poster in Gordon's locker. However, John Guthrie later performed a pass on the level, modifying the locker and placing Isabel's photo there instead.[6][7] In addition to this, an unused name tag with the name "Isabel Teasley" can be found in the textures.

Selected gameography[edit]


Company biographies[edit]

Harry Teasley - Game Designer/Level Designer/Artist
Harry came to Valve from Shiny Entertainment, where he was working on the upcoming game Wild 9's. Prior to Shiny, Harry was at Williams Entertainment where he was lead artist and designer for PlayStation Doom, and was lead designer for Doom64. Before Williams, Harry worked with Sid Meier at Microprose on Civilization as well as Pirates Gold, among other projects.

See also[edit]


  1. 1.0 1.1 Harry Teasley's personal website
  2. 2.0 2.1 Harry Teasley's personal website
  3. Biography on Valve's official website (January 11, 1998) (archived)
  4. Chat log on Wavelength (April 22, 1998) (archived)
  5. Li icon.png Harry Teasley on LinkedIn
  6. The girl in Gordon's locker turns 14 today. on Reddit (January 3, 2012)
  7. I'm the dad of the girl in Gordon's locker on Reddit (September 1, 2016)

External links[edit]