How Valve stole the Portal concept

[eliasfrost]

I thought everybody knew about this game, when the new release was just around the corner, everybody was talking about the portal technology, Valve didn't steel any credit, they merely expanded on the concept of portals in game (being able to create them yourself).

I think it's really unfair of CoD and Activition to take all the credits from Wolfensteins creator ID, they were first with First Person Shooters!