Valve supports your game mod career
Not only does Steam handle transactions for buying and downloading games from both big publishers and independent developers, but it also allows gamers to easily 'mod' their games to add functionality or change the game in weird and wonderful ways.
Revenue generated from the mod will be split between involved parties.
Until now, mods in the 'Steam Workshop' have had to be free. In fact, the modding culture even away from Steam tends to lean towards free distribution even though some mods...