> that Counter Strike was a fan-made mod in the beginning and now it's one of the most played games on the planet and Valve produces it itself now. As were DOT

> that Counter Strike was a fan-made mod in the beginning and now it's one of the most played games on the planet and Valve produces it itself now. As were DOTA and Team Fortress! Taking well loved mods and giving them some AAA shine has been a rather successful strategy for Valve.