The Elder Scrolls Construction Set.
It was first released alongside Morrowind in the Game of the Year Edition.
The Oblivion version is available for download from Bethesda's website.
Download GECK from Bethesda's downloads page
Sadly no the GECK is only compatible with the PC.
At the fallout 3 website (www.bethsoft.com) download the geck to make mods!
Its only on the PC.
Fallout 3 was created by the same people, Bethesda Studios. Many call it "Oblivion with guns."
First off the G.E.C.K. can only be used on The PC and you will need the fallout 3 game installed to use it combine the G.E.C.K. and softwares like blender or 3d max to create good mods and what not the geck is a item in fallout that can only be used on a quest
The GECK is located inside Vault 87, North of Little Lamplight, it's only access point. http://fallout.wikia.com/wiki/Finding_the_Garden_of_Eden
Just for the PC ATM i really HOPE they release for the 360 There will never be a GECK (or equivalent) for the 360 because it is against Microsoft's ToS to modify the game in any way. the gecks only on broken steel
Well Oblivion and Fallout 3 are great games i would go for fallout 3 and if you can get fallout new vegas aswell there great games! hope i helped
Morrowind and fallout 3.
You need to update the geck to version 1.5, for example from here: http://www.shacknews.com/file/13515/fallout-3-geck-15-update Cheers
Nope, but you could try Hex Editing if you really want to mod your 360 game.