I would recommend this game to the people that like Tactical games or a fan of swat style game. Door Kickers allow you to control of a SWAT Team and take them through mission, Escorting vip, Eliminating all hostile target, Rescuing hostage.. etc. Some of the mission allow you to use sniper to cover your troop. If your troop died in the mission, you can restart to replay to prevent it from happening or move on and your troop will remain dead. It will be worse if you rename your troop to one of your friend or something you love and he died.
The game currently have 3 campaign mission. Community Server, Drug Buster and Cell Crusher. Community server is fairly easy but Drug buster and cell crusher is quite hard for me. They also have a iron-man mode for the campaign to prevent you to restart the mission.Therefore if you fail you lose all your man that died. After that you could play in singleplayer or go to the workshop and find some user-created mission to play.
There two ways players can play this, Plan and strategize before going in. Or go in real time without pausing to plan ahead. The game is kinda like a puzzle when you plan. Though you could always go rambo and hope everything goes well, this work like 10% for me.
The game is fairly realistic, the Equipment for example a hammer that can break down a locked door, would weight you down and thus lowering down your troop mobility. Mobility is quite importment in the game so is the equipment, so choose wisely. There's different types of body armour, for example the basic body armour are able to block pistol bullets while maintaining mobility. However the downside is they would not able to block rifle bullets. The troop would survive a couple hit from the enemy depending on the armour the troop are wearing and the gun the enemy are using.
Doorkickers have 5 classes, Pointman, Assaulter, Breacher, Stealth and shield. Pointman is a pistol only class as they generally are used in Close quarter combat. Assaulter is an all-rounded class able to engage in close quarter combat and long range. Breacher is a shotgun class, able to shoot the hinges of the locked door and breach inside the room. Stealth is a class that allow players to use slienced guns, Lastly Shield allow you to use well... it fairly self explanatory, the shield class allow you to use shield. Allowing the swat to use the shield and block most of the bullets.
Depends on players playstyle, you could always go stealth with the stealth class and complete them without them noticing the players. Or you can go loud, breach in the house and strike fear.
There is a skill system which is called Doctrine. There's 3 Doctrine Tree: Handguns, Long guns and shotguns. Again pretty self-explanatory, Handguns trees help with handguns skill for example increase precision at close or medium ranges or pull out the pistol when the rifle is empty and your engaging the hostile.
Long guns trees help both stealth and assaulter class. As at the bottom of the long guns trees is required for stealth as they wouldn't shoot at the enemy unless the player instruct them to, for the assaulter class example negate cover able the troop to engage target partially obstructed by cover.
The Shotguns trees enable the shotgun class to shoot off the hinges of the locked door and improve overall skill of the shotgun classes. Some skills in the trees increase the reload skill.. etc.
Than there is Roster. Roster allow you to unlock weapon, equipment and armour. It allow you to customise each swat member. The game has a fairly good amount of weapon you can unlock. Each weapon is quite different with different stats. Whether you want a good stopping power weapon or a good accurary weapon it's in there.
Some of the problem I had is, getting a troop to stand behind the shield and shoot at the enemy. Usually they would walk through the guy using the shield and end up getting his body full of bullet. Another problem is, I had one of the Swat member to pick the door lock and sometimes they just stand in the door or glitch through it, I had to get another Swat member kick the unlocked door open to save the guy that is glitched through the door which is getting shot by a enemy which thought that the one of my guy is a ghost.
In conclusion, its a great game that have a lot of Potential. I recommend you to play this game even if your not a tactical game fan.