Search for "Gamebryo SDK archive" – but expect broken installers and no support.

| Game | Engine Version | Download Mod Tools Instead | |------|---------------|----------------------------| | The Elder Scrolls IV: Oblivion | Gamebryo 2.0 | (free on Steam) | | Fallout 3 / New Vegas | Gamebryo 2.2 | GECK (free on Steam/Bethesda) | | Civilization IV | Gamebryo 1.0 | WorldBuilder (included with game) | | Divinity II | Gamebryo LightSpeed | No separate tools – engine bundled |