Mistake – a game with two different scenarios and characters. The first company tells the story of an astronaut who, due to an error in the onboard computer, was thrown into the near future of planet Earth. When he descends to the surface, he learns with horror that humanity has died out, and the world is filled with colossal animals. Huge poisonous snakes, giant spiders and frogs – all these monsters would not mind having a snack on the last little man. Therefore, the goal of the space traveler is to fight off waves of opponents and escape.

The second storyline is dedicated to a smart fish who decided to leave the ocean in search of a mystical cave. Her grandfather often told her legends about this place, so the fish finally decided to see the miracle with her own eyes. At first, it seems that these two stories have no connection. But after completing both companies to the end, the user will be able to understand the whole background of the events taking place in Mistake. The gameplay is quite short – the passage can take several hours.

The gameplay for both stories is the same. The protagonist fights constantly appearing enemies, using various bonuses. Among them there may be buffs that enhance the hero's abilities or new weapons. Each subsequent location is more difficult than the previous one, and enemy mobs become stronger. To compensate for this, the developers added the ability for the player to heal the main characters with special buffs.