The Elder Scrolls IV: Oblivion Construction Set

The Construction set for The Elder Scrolls IV: Oblivion is free to download and makes the PC game much more unique as you have the oppatunity to rewrite the world of Tamriel or even [[Cyrodiil] to your liking - there are no limits.

Things to Do using the TES Construction Set
In the CS, you can simply add a new NPC to the game, or you could create a new dimension, world or land, depending on skill, knowledge and liking. Some people create their own Quests and upload them to a Mod website such as TESNEXUS. TES CS can be very mature at times, as you can create adult themes and add extreme nudity, swearing and other adult things, but some people stick away from this and simply create other things like landscapes, shops, a new district or just a new sword to give to give to your character.

You can totally revamp the game, with or without help. If you have skill enough, then feel free to create a new race, new bodies (such as body adjusters for fitness, bust, legs, height etc), classes and Birthsign. Then you can alter the very landscape by making the Imperial City become more modern, ending a city such as Anvil, including Morrowind or simply make a new house. With some mods, you could even change the Main Quest so as it suits you!