Most ported videogame
Who
Tetris (Alexey Pajitnov, 1985)
Where
Not Applicable
When
Tetris, created by Alexey Pajitnov in 1985, has been translated (or “ported”) to more than 65 different computer game platforms, including mobile phones. Updated in Guinness World Records Gamers Edition 2011

GWR Video Gamer's Edition 2008.