Onirism combines action-adventure, shooter and adventure. The game uses a third-person view. It has 3D cartoon graphics. There is no cruelty or violence in this title. There are battles with enemies, but they do not die, but fall asleep.

The Onirism project takes place in the fictional dimension of Crearia, full of colorful landscapes. It has a lot of different biomes. The locations are made in different settings – from fantasy to science fiction. They also differ in seasons. You can travel through them on foot and by hovercraft. In addition to the single-player mode, there is multiplayer, which includes co-op and PvP. It is possible to play with two, three or four people on one computer via split screen. There is partial support for gamepads. One player will be able to control his character using the keyboard and mouse. And the rest will need joysticks.

The essence of the gameplay is the need to shoot monsters, explore the area and look for secrets. The arsenal includes more than a hundred varieties of toy weapons. It does not kill adversaries, but knocks them out. You can also use abilities. In addition, as you progress, various skins are unlocked.

The plot is divided into chapters. The story follows Carol's adventures. One day a portal appears in a little girl's room. A creature from another world steals a stuffed animal named Banban and makes off with it. And the heroine jumps after him into the teleport and goes in pursuit of the villain.