Portal 2 font here refers to the font used in the cover art of Portal 2, which is a first-person puzzle-platform video game published by Valve Corporation.
The title on the cover art is probably set in FF Din Bold designed by Albert-Jan Pool. The font is a commercial one and you can purchase and download the font here.
Download Din Font
The Din font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.