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