The Elder Scrolls IV: Oblivion (or Oblivion) is a single-player role-playing video game developed by Bethesda Game Studios, and published by Bethesda Softworks and the Take-Two Interactive subsidiary 2K Games. It is the fourth installment in The Elder Scrolls action fantasy video game series, following The Elder Scrolls III: Morrowind. Oblivion was released March 20, 2006, for Windows PCs and the Xbox 360. A PlayStation 3 release was shipped March 20, 2007, in North America and on April 27 in Europe. After a number of smaller content releases, a major expansion pack—Shivering Isles—was released.

A picture of a prison, which you'll be in soon enough, criminal scum.
Oblivion is an sandbox game, which means you have won't be limited by the story, and you can generally do what you want. I could go on, but time to start talking about other things.
Oblivion is a game that can be customized, which is done through the construction set and mods.
http://planetelderscrolls.gamespy.co...Detail&id=3953
http://planetelderscrolls.gamespy.co....detail&id=268
http://www.worldofelderscrolls.de/?go=dlfile&fileid=12
http://planetelderscrolls.gamespy.co...Detail&id=4226
These four mods are overhaul mods. They change the whole game. Fcom is an effort to combine all four of the major overhaul mods I've listed above. Link to Fcom.
http://www.tesnexus.com/downloads/file.php?id=12249
For information about Fcom, and how to install it, google it. I'm not a baby-sitter. Fcom has changed a bit too. It combines more mods, which you can see here.
http://www.uesp.net/wiki/Tes4Mod:FCOM
If you like rpg games, you'll probably like oblivion.

More pictures.
Links:
http://www.uesp.net/wiki/Main_Page
http://tesnexus.com/
http://planetelderscrolls.gamespy.com/
http://www.elderscrolls.com/home/home.php
I personally recommend oblivion. It has a lot of things to do, such as quests, killing things, and fucking around. If that gets boring, download and install more mods.