Hats Are Not Allowed crosses a role-playing game with a fighting game. The battles here take place in real time in the format of duels. This convention is explained by the plot. Only robots participate in the fights, which combat modules do not allow to fight in groups. Most often, the hero fights alone with each opponent in turn. Sometimes there are battles between squads. They involve one team member from each side. The combat is based on timing. In fights, you can strike your opponent in the legs, torso and head, as well as block or parry his attacks. The controls are tailored for the use of the keyboard. In this case, some of the buttons must be held down, not just pressed.

Hats Are Not Allowed takes place in an absurd world inhabited only by robots. Mechanical creatures have built an authoritarian society and banned hats. According to local laws, every bot seen wearing a hat is subject to destruction. Any witness who does not destroy the violator will also be subject to disintegration. One day, a prohibited accessory ended up on the protagonist's head and awakened his consciousness. After that, the hero began to fight tyranny and began to gather an uprising. The main character can use a spear, shield and sword. In between fights, he finds and installs new parts in himself. Such upgrades increase his characteristics. In addition to the story mode, the video game has a local multiplayer, allowing two people to play on one computer. The second user does not need a gamepad, because gamers can use one keyboard for two.