Complete all levels with at least 1 sheep left.
Complete all levels with at least 6 sheep left.
Complete all levels with all 9 sheep left.
Over 500 enemies destroyed.
Over 250 000 bullets fired.
Over 250 sheep saved.
Over 500 towers build.
Over 100 towers upgraded to level 3.
Over 100 towers upgraded to level 2.
Over 100 big guns builds.
Over 100 laser towers builds.
Over 100 rocket towers builds.
Over 100 slowdown towers builds.
Over 100 gattling guns builds.
Over 100 guns builds.
Saved one sheep