Hexic HD

Easy achievements:
Go to Time mode and start a game on the Normal difficulty setting.
Get at least one cluster for the clock to start. Then, wait for the
time (50 seconds) to run out. This counts as a full game. You can do
this as many times as needed.

To get the achievement of "Flower Child", you must form a flower cluster.
The easiest way to do this is the wait until you see a partially formed one
(four or five pieces of the flower already together). Then, drop in the
last piece and you will have created a flower. Flowers are worth a lot
of points. Make a flower whenever you get the chance to do so.
Note: Do not destroy anything beneath a partially formed flower,
or the flower will break apart.

To get the achievement of "Star Gazer", you must form a star cluster.
The easiest way to do this is look for a partially formed star cluster
(two pieces) and just drop the last star piece in whenever one gets
close enough to the cluster. Also, the pieces in a star cluster do not
need to be the same color; they just need to be star pieces. Forming
a star cluster also gives you a lot of points and usually a large combo.
Note: Do not destroy anything beneath a partially formed star cluster,
or the star cluster will break apart.

 