17 окт. 2016, 22:2617.10.16
Participate in tournaments, capturing trader's emporium long enough to be able to collect some and logging in for 30 consecutive days.
Sometimes they also give free drachmas in special occasions like Christmas, etc. but it's very rare.
Some achievements also reward you with drachmas. You can check your achievements by clicking the small icon on the top of your level indicator on the left of your messages.
You can also participate on some forum contest to win drachmas.