All challenges, including those requiring "Alien" level skill, are marked as complete with gold trophies.
If you are a content creator, a modder, or someone who loves setting up dedicated servers, having every car unlocked is essential. You don't want to be in the middle of organizing a league race only to realize you haven't "unlocked" the necessary vehicle content on your profile. A complete save file removes these restrictions entirely. assetto corsa 100 save game download
With a 100% save file, you are no longer a rookie grinding credits. You are a collector. You are a test driver. You can now jump into any car, on any track, at any time. including those requiring "Alien" level skill