If you are picking up Deus Ex: Human Revolution for the Playstation 3, you may want to know the size of the mandatory install in case you need to make room on the hard drive. While the PS3’s Blu-Ray does allow for bigger games to have up to 50GB of data, the relatively slow speed of the drive inside the console means that you sometimes have to install parts of the game onto the hard drive in order to play it properly and smoothly. Deus Ex will take up about 3GB of space on your hard rive meaning you will have to start cramming things in there with all the new releases coming out over the next few months.