[gberger]

Valve doesn't make games that you can play sitting in the subway.

[lghh]

Valve also doesn't make Fruit Ninja, but they were just trying to make a point.

[milesokeefe]

No, but they do profit from it being sold on their platform:

http://store.steampowered.com/app/400760/

Well, technically not the brand name, but hey close enough.