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