They tried using a different main character as well, but found that the game suffered by losing the relationship between Chell and Glados.

FORBES: Portal 2 Originally Didn't Have Portals

GLaDOS taunts you, Wheatley cracks jokes and as you play, you slowly learn about the history of Aperture as you descend into its levels.

FORBES: Black Ops 2 Shows How Not To Tell a Story Through Gameplay

The sequel to the multi-award winning 2007 Portal game pits the player against GLaDOS, the AI bad guys behind the laboratory setup featured in the first game, PC World reports.

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