So, recently Deus Ex: Human Revolution - Director's Cut came out for the Wii U, with a bunch of new features not present in the original game - integrated DLC, improved boss fights, director's commentary, and a few other things. The game was also released for other systems, including PC.
Now, the Steam version of the game is twenty dollars. But, there's a special deal. If you already own the original Deus Ex: Human Revolution, you get 50% off. If you also own The Missing Link DLC, you get an extra 25% off. So if you want the new features in the Director's Cut, but already own the game, you get it for five bucks. Sounds great, right?
The Steam forums tell a different story