The skill for Commando is Special Ops.
Basic Tips:
The Commando is the exact opposite of the Sniper. It’s all about popping up in the middle of the enemy and wrecking havoc at close range. Heck, Commandos are the modern day berserkers… a highly skilled fighter to take on a squad at 5m, and completely crazy for doing it.
The holy trifecta of your loadout is your weapons. The shotgun is perfect for one shot take downs, but it makes a lot of noise — so it’s best used when backup is nearby since everyone and their uncle is going to hear you. The SMG with a silencer is perfect for getting in there with little or no support because of its high fire rate with the added bonus of keeping you off the enemy’s mini-maps. Finally, don’t forget to grab the “Knives: Improved Swipe Speed” and “Knives: Expanded Reach” skills. Nothing says “Commando” better than rushing in with a med kit and a knife, dropping everyone and never making a sound!
Seriously consider Improved Stealth and Health for survivability.
Stay out of open areas and stick to cover and flanks so that you can safely rush your opponents when the time is right.
Advanced Tips:
The Motion Sensor can keep you alive. Equip it and you can see your enemies on the mini-map every time they twitch. Know what’s around that corner BEFORE you get there.
Shadows are your friend. Don’t make a noise and hold still and most of the time they will run right by you! Remember: you have to get to your objective alive and undetected.