Here is the full list of all 70 Shield Impact achievements.
New Wave Achieved.
Ready player one
Hum .. I know!
Reach the wave 100.
Release 1 warrior.
Keep 3 Warriors.
Keep 10 Warriors.
Keep 15 Warriors.
Defeat 5 enemies in succession. 5 hits.
Defeat 10 enemies in succession. 10 hits.
Defeat 20 enemies in succession. 20 hits.
Defend 100 arrows.
Do your first special attack.
Defeat 20 enemies without using attacks.
Not release warriors during 5 waves.
Dash -> spinning -> special attack.
Survive with 5 warriors during 3 waves.
Survive with 10 warriors during 1 wave.
Miss 3 friends in a single wave.
Do 20 hits with 20 warriors.
Defeat 3 enemies by spinning.
Do 7 hits with 7 warriors.
Do 15 hits with 10 warriors.
Do 8 Hits using Special Attack.
Do 15 Hits using 7 warriors with special attack.
Reach 50,000 score points.
Defeat 500 enemies.
Defeat 1000 enemies.