The PC, as a gaming platform, has had something of a tumultuous history. Despite struggling somewhat in the early 00's thanks to console competition, the popularity of digital downloads and online multiplayer has thrust PC gaming back into the spotlight in recent years. By far the most dynamic gaming platform available, the PC has the advantage of being totally open in comparison to the consoles. This has not only allowed indie developers to more easily release their games on PC, but it's also given players the opportunity to release mods - labours of love that can change the original game significantly. In this list, we've put together the greatest games ever released on PC, from early 90's classics to modern hits. There's a lot of choice when it comes to the three decades or so of PC gaming history, and we've had cut some of our favourites, but every title in this top 20 has earned its place in one way or another.