Here is the full list of all 45 RUNNING WITH RIFLES achievements.
100.000 bullets shot
Win the Brownpants campaign
Roadkill 100 soldiers
Destroy 5 prison bus/doors
50.000 bullets shot
Destroy 10 special crates and deliver 8 secret cargo vehicles
Kill 500 enemies with blast projectiles
Heal 10 wounded soldiers
Heal 5 wounded soldiers
Win the Greycollars campaign
Destroyed the Darkcat tank
Destroy 5 special crates and deliver 4 secret cargo vehicles
Roadkill 20 soldiers
Destroy 2 special crates and deliver 2 secret cargo vehicles
Win the Greenbelts campaign
Kill 200 enemies with blast projectiles
Stab 5, kill 20 with a suppressed weapon and spot 7 strategical enemy structures
Stab 10, kill 50 with a suppressed weapon and spot 15 strategical enemy structures
Unlock 10 enemy weapons
Destroy 10 enemy structures and 2 communication structures
Stab 2, kill 10 with a suppressed weapon and spot 2 strategical enemy structures
Died 500 times
Kill 10 elite soldiers
Roadkill 5 soldiers
Unlock 5 enemy weapons
Kill 100 enemies with blast projectiles
Destroy 20 enemy vehicles
Destroy 5 enemy structures and 1 communication structure
Destroy 3 prison bus/doors
Destroy 1 anti-air structure
Destroy 2 enemy structures
Destroy first prison bus/door
Kill 1000 enemy soldiers
Destroy 10 enemy vehicles
Kill 5 elite soldiers
Died 200 times
Destroy 5 enemy vehicles
Heal 1 wounded soldier
Kill 100 enemy soldiers
Kill 500 enemy soldiers
Died 100 times
Unlock the first enemy weapon
10.000 bullets shot
Win your first map of the campaign
Kill first elite soldier