What are the connections between Portal series plot and Half-Life series plot?

I heard a lot of rumors about Portal series and Half-Life series plots relation but I didn’t found any link.

Can you describe which relations exists between this two stories?


Aperture Science (which is the firm that developed the Portal gun) is in direct competition with Black Mesa (which is the firm for which Gordon Freeman worked) for military contracts

See the section Other facts on this link

Aperture Science and Black Mesa were bitter rivals. As seen in the Portal maps “testchmb_a_15” and “escape_02”, Aperture Science employees were briefed on Black Mesa through slideshow presentations, such as one titled “Dollar$ and Sense: Competing with Black Mesa for DoD and Government-wide Acquisition Contracts”

EDIT: Here’s an excellent guide on Half Life: http://members.shaw.ca/halflifestory/
Check out the timeline for an awesome detail of all events in the Half Life saga, and in the bottom a little speculation to its relation to Portal:

The date that the events of Portal take place aren’t certain. We do know that GLaDOS says to Chell: “Are you trying to escape? [chuckle] Things have changed since the last time you left the building. What’s going on out will make you wish you were back in here. I have an infinite capacity for knowledge, and even I’m not sure what is going on outside. All I know is I’m the only thing standing between us and them. Well, I was. Unless you have a plan for building some supercomputer parts in a big hurry, this place isn’t going to be safe much longer.” This implies that the game takes place during the Portal Storms or afterwards.

This site is not official but it’s a great analysis IMO.

Source : Link , Question Author : Drake , Answer Author : reirab

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