Demos for the video game "Portal 2" appear on various video game journalism websites (such as IGN.com), as well as YouTube and other video streaming websites. Valve, the company that created the game, never released a playable demo version of "Portal 2."
"Portal 2" was released in 2011 amid a flurry of digital advertisements and media coverage. As of 2015, much of this coverage is still available online at YouTube and various gaming websites. IGN.com, for example, hosts dozens of announcement videos, trailers and reviews that demo the game for interested players. Similarly, advertisements and demos for "Portal 2" are on Valve's digital distribution platform Steam.