Here is the full list of all 34 Heavy Fire: Shattered Spear achievements.
Find and destroy 100% of special objects.
Fire 25,000 rounds of ammunition.
Find and destroy 75% of special objects.
Find and destroy 50% of special objects.
Complete a level without causing any destruction.
Complete all missions in Veteran Mode.
Complete the last mission on Veteran Mode without using checkpoints.
Kill 250 enemies with a pistol.
Destroy 500 objects in total.
Complete the 12th mission.
Complete all missions in Rookie Mode.
Perform 100 headshots in total.
Complete any mission without being hit.
Complete the 10th mission.
Kill 500 enemies with an additional/special weapon.
Score 1,000 total kills.
Perform 5 headshots in a row.
Complete the 8th mission.
Destroy 200 objects in total.
Achieve 100% sniper accuracy.
Complete the 7th mission.
Chain together 7 consecutive kills.
Complete the 5th mission.
Score 500 total kills.
Perform 5 splash damage kills simultaneously.
Perform 4 splash damage kills simultaneously.
Perform 50 headshots in total.
Complete the 3rd mission.
Score 250 total kills.
Complete the 2nd mission.
Complete any mission with 50% accuracy or higher.
Perform a QTE perfectly in one level.
Destroy all red barrels in one level.
Chain together 5 consecutive kills.