You can receive many achievements in World of Tanks Blitz, but only few are as desirable as the Mastery Badges.
Mastery badges are an ultimate display of your prowess in a specific armored vehicle and the highest class (Ace Tanker) is not easy to get unless you know every trick with a certain tank.
To qualify for any of the 4 classes of the Mastery Badge, you need to earn more experience in a single battle than the average highest experience of certain percent of all players who have been playing the very same tank within the last seven days.
Once earned on a tank, nobody can take the Mastery Badge from you!
Because of the above mentioned, the difficulty curve of obtaining the highest Ace Tanker Badge is relative to how many players fight with that particular tank and how good they are. The threshold for obtaining an Ace Tanker in one tank can be different from another one, so do not be surprised or alarmed.
Mastery Badges – how awesome you need to be?
Mastery Badge: Ace Tanker - Earn more experience in a single battle than the average highest experience of 99% of all players in the same tank within the last seven days.
Mastery Badge: I class - Earn more experience in a single battle than the average highest experience of 95% of all players in the same tank within the last seven days.
Mastery Badge: II class - Earn more experience in a single battle than the average highest experience of 80% of all players in the same tank within the last seven days.
Mastery Badge: III class - Earn more experience in a single battle than the average highest experience of 50% of all players in the same tank within the last seven days.