Valve mainstays Portal 2 and Left 4 Dead are now backward compatible on Xbox One, Major Nelson announced today. Those two titles bring to 200 the number of Xbox 360 games playable on the new console.
The 2008 zombie shooter follows its sequel, Left 4 Dead 2, which was added to the backward-compatible roster three months ago. It and Portal 2 are joined by Flashback, a 2013 remake of the 1992 platformer, and Brain Challenge.
The fully updated list of backward-compatible Xbox 360 games on Xbox One can be seen below.