DiRT 3 Complete Edition

You have to do a "clean" run which means that your vehicle can't take any damage, some guides on the internet say that you also have to get a platinum medal but after some testing it seems like that is false, and you should be able to get this achievement without getting a platinum medal.

Simply start a Gymkhana Sprint event (I would recommend the first one, "gymkhana sprint 01") and complete the race without hitting any walls, barrels or other objects. You can hit the smash objects as well as the cardboard boxes that are scattered around the map.

How i got it: I got it with a time very close to the platinum medal (around 46 seconds) and my vehicle did not take any sort of damage.

Good luck on getting this achievement!