Full list of all 15 Clash Force achievements worth 1,000 gamerscore. It takes around 0.5-1 hour to unlock all of the achievements on Xbox One.
Complete the Stage 15.
Complete the Stage 14.
Complete the Stage 13.
Defeat Stage 12 BOSS.
Complete the Stage 11.
Complete the Stage 10.
Complete the Stage 9.
Defeat Stage 8 BOSS.
Complete the Stage 7.
Complete the Stage 6.
Complete the Stage 5.
Defeat Stage 4 BOSS.
Complete the Stage 3.
Complete the Stage 2.
Complete the Stage 1.