Narbacular Drop was an indie game that eventually became Portal.

Development Gag: One of the achievements is called 'Narbacular Drop'.

Defictionalization: The Space Core is going into spaaaaaAAAAAAAaaaace!.

YouTube user Harry101UK 'GLaDOS-ified' it to Lowrie's approval and made a music video. In April 2015, the song was re-recorded in a studio and uploaded to the internet. They recorded it in their living room and offered it to Valve for use as an Easter Egg in the game, but it ended up not being utilized.

Cut Song: Ellen McLain and her husband John Patrick Lowrie wrote a song for GLaDOS to sing.

There's also this song (officially titled 'PotatOS' Lament'), in Latin this time, with McLain coming up with the lyrics again (according to what she calls her 'bad high-school Latin'). Jonathan Coulton was also able to write 'Want You Gone' with her in mind, allowing her to give a richer, fuller performance than in 'Still Alive'.

The Cast Showoff: Ellen McLain actually sings opera this time, in Italian, to lyrics she made up herself.

The blue plasma walls are also similar to official Hard Light Bridges.

Ascended Fanon: Red laser fields, originally from Portal: The Flash Version.

JK Simmons plays Nathaniel Burke, a professor training insurance agents in the Farmers Insurance commercials.

In the trailer for the Perpetual Testing Initiative, Cave Johnson starts his speech by talking about his father, who was a 'professor of farming at the local farm college'.

A Dummied Out voice clip has Cave Johnson talking about a test that might give you the ability to excrete spider silk from your fingers - something J.

One of them, a manly action-hero wannabe who calls himelf 'Rick The Adventure Sphere', is a clear nod to Nathan Drake, perhaps his most well known voice role.

Nolan North voices some defective turrets and personality cores.

We’ll be discussing the benefits of T-Peel tests over other adhesion test types as well as a live demonstration of pass/fail criteria. This test is a quick, simple, and repeatable method when establishing quality or safety standards in adhesion strength testing. Commonly known as the T-Peel Test, this type of testing can be found in industries like packaging, automotive, leather and upholstery, food, and beverage and many more. This webinar will focus on the most common approach to measuring the adhesion strength of two materials bonded together with an adherent.

Cost: Free to Attend - Registration Required.

How to test adhesion gel in portal 2