Here is the full list of all 67 Kick Ass Commandos achievements.
Complete Mission Pack 6: Hell on Ice
Survive the Ice Caves in Mission Pack 6
Rank Up a Commando Brigadier General
Defeat Boss Bomber in Mission Pack 6
Unlock Commando Berserker in Mission Pack 6
250 Enemies Killed by Explosions
Win Bumper Tires in Mission Pack 6
Complete Mission Pack 5: DNA Test
Rank Up a Commando Colonel
Kill the Queen Beetle in Mission Pack 5
Kill the Giant Gator in Mission Pack 5
Unlock Commando Gator Jack in Mission Pack 5
Rank Up a Commando Lieutenant Colonel
250 Enemies Killed by Flames
Kill the Monster Yeti in Mission Pack 5
Rank Up a Commando Major
Complete Mission Pack 4: Going Rogue
Survive the Horror in Mission Pack 4
Unlock Commando Midnight in Mission Pack 4
Rank Up a Commando Captain
Kill 2,500 Enemies
Rescue the Bunnies in Mission Pack 4
Unlock Commando Ricardo in Mission Pack 4
Rescue 100 Commandos
Rescue Captain Gary in Mission Pack 4
Rank Up a Commando 1st Lieutenant
Complete Mission Pack 3: Bombs Away
Destory all the Bombs in Mission Pack 3
Rank Up a Commando 2nd Lieutenant
Get Major Wood in Mission Pack 3
Unlock Commando Joker in Mission Pack 3
Rank Up a Commando Sergeant 1st Class
Defeat the Anvil in Mission Pack 3
Complete Mission Pack 2: Krystal Yayo
Kill the Rocket Bros in Mission Pack 2
100 Enemies Killed by Knife Stabs
1,000 Knife Stabs by the Player
Unlock Commando Blaze in Mission Pack 2
Rank Up a Commando to Staff Sergeant
Complete Mission Pack 1: Basic Training
Kill 500 Enemies
Rank Up a Commando to Sergeant
Survive the Dreaded Showers in Mission Pack 1
Unlock Commando Blondie in Mission Pack 1
Rescue 25 Commandos
Unlock Commando 6-Pack in Mission Pack 1
Rank Up a Commando to Corporal
Rank Up a Commando to Private 1st Class
Kill 100 Enemies
Unlock Commando Mohawk in Mission Pack 1
Complete the Tutorial Mission
Kill 10,000 Enemies
Kill 25,000 Enemies
Rescue 250 Commandos
Rescue 500 Commandos
Rescue 1,000 Commandos
5,000 Enemies Killed by Bullets
500 Enemies Killed by Grenades
25 Enemies Killed by Landmines
500 Enemies Killed by Rockets
50,000 Bullets Fired by the Player
10,000 Flames Fired by the Player
1,000 Grenades Thrown by the Player
1,000 Rockets Fired by the Player
Rank Up a Commando Major General
Rank Up a Commando Lieutenant General
Rank Up a Commando General