Coin Connoisseur

Coin Connoisseur is an achievement that can be unlocked by collecting 10 coins. In the 1.0, 1.1, 1.2, 1.3 versions of OvO you have to get 12 coins in order to get the achievement. It does not grant any gold (not including the gold you get from a coin). The achievements description says "Collect 10/12 coins".