Zero Hour brings a very grounded CO-OP, 5v5, team vs team, Close quarter combat experience to the game that focuses on two teams with each player having their own roles. The attackers utilizing shields, weapons and the planning table and the terrorists utilizing traps and gadgets in order to fortify the area. With CO-OP game mode will allow you to play bigger operations that you can either tackle solo or with a team of 5. The game mode will have a difficulty level of "Regular" or "Hardcore". The difficulty level will determine the reaction time and predictability of the enemies. The game mode will not prioritize killing all enemies and will allow stealthy approach to complete objectives. You will be able to arrest the enemies if in the right scenarios. You will also need to collect evidence, such as dropped guns from the enemy.

At the start of each round, MS-09 Unit (The Attacking Team) can come up with strategies by drawing in the planning table with a 3D miniature version of the location being played similar to the use of blueprints. It can be used to direct teammates where to spawn and/or advance from. There are 3 types of marker that you can place around the planning table which can indicate danger and objectives. During this phase, The Terrorists (The Defending Team) will be given time to place traps and gadgets to aid in their defense strategy.

Both Teams have resources that they need to manage per 3 rounds. The Attacking Team has 2 sets of 5 types of weapons while The Defending Team has 5 sets of 5 types of gadgets. This is crucial in terms of saving your resources, picking up and utilizing your opponent’s weapons, and not giving an advantage to your enemies

The hostage held captive by the defenders will have its own mindset which means it would run away if not careful. This indicates that it would be critical to keep an eye on the hostage and move it around wherever a player feels necessary.

In order to bring a realistic approach, the doors help in encouraging slow and tactical gameplay. It would cause both teams to hesitate before entering a room since it will be oblivious to know what’s going on behind the door.

The switch causes a complete blackout of the whole operation building that you're playing on. By doing this, the players won’t be able to visualize their surroundings unless they use the tactical flashlight.