Purchasing an unused from third-party resellers (though availability is rare and prices may be high). Technical Details
If you already own the game and need to generate a technical report for support: DiRT 3 Free Download
The resulting .txt file will be saved in your ~/Downloads folder. DiRT 3 and its Complete Edition were removed
In the DiRT 3 Complete Edition pre-game options, go to the Support tab and click Generate Report . This promotion has since ended
DiRT 3 and its Complete Edition were removed from the Steam marketplace in early 2017. This was likely due to the expiration of licensing agreements for the vehicles and music featured in the game.
In late 2016, the Humble Store briefly offered the DiRT 3 Complete Edition for free to keep forever on Steam. This promotion has since ended.
Searching for a " DiRT 3 Free Download" today is complex because the game has been from major digital storefronts. Current Status & Availability