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