Achievements are "special missions" that you are required to carry out as you play. A detailed list of these missions can be found in your profile. Just click on the Profile icon and scroll down to the Achievements session.
For each achievement you unlock, you get points that help you proceed to higher Levels and unlock new Modes of the game!
When you achieve a mission, you are not required to do something. The corresponding area in your profile is updated automatically and you collect the points.
You can find a detailed Tichu achievements list below:
TWIN FLAME
(10 points)
Both you and your teammate finish your hands before any opponent do so
TICHU MASTER
(10 points)
Finish your hand first while you've called Tichu
MYTHICAL CREATURES
(20 points)
Play Dragon above Phoenix
AND HERE'S MY GRAND TICHU
(20 points)
Finish your hand first while you've called Grand Tichu
EAT MY DUST
(20 points)
Play a bomb over Dragon
BOMB FRENZY
(30 points)
Play o bomb on a bomb
GOLDEN HAND
(30 points)
Play a Straight of at least 8 cards