Here is the full list of all 35 Watch Tower achievements.
Complete level 1 with three stars
Complete level 2 with three stars
Complete level 3 with three stars
Complete level 4 with three stars
Complete level 5 with three stars
Complete level 6 with three stars
Complete level 7 with three stars
Complete level 8 with three stars
Complete level 9 with three stars
Complete level 10 with three stars
Complete level 11 with three stars
Complete level 12 with three stars
Complete level 13 with three stars
Complete level 14 with three stars
Complete level 15 with three stars
Complete level 16 with three stars
Complete level 17 with three stars
Complete level 18 with three stars
Complete level 19 with three stars
Complete level 20 with three stars
Complete level 21 with three stars
Complete level 22 with three stars
Complete level 23 with three stars
Complete level 24 with three stars
Complete level 25 with three stars
Complete level 26 with three stars
Complete level 27 with three stars
Complete level 28 with three stars
Complete level 29 with three stars
Complete level 30 with three stars
Shoot 1 time
Shoot 10 times
Shoot 100 times
Shoot 1000 times
Shoot 10000 times