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