Between the world of people and the other world, where all evil spirits and monsters live, there are several portals. This is for contingency. Each portal is protected by a guard - a skeleton of gigantic growth, skillfully wielding a bow with an inexhaustible supply of arrows. Anyone who approaches the portal at a certain distance will receive an arrow in the head without warning. Recently, the number of people wishing to cross the border from the dark world has increased markedly and is growing incessantly. A string of monsters of all stripes are moving in the hope of breaking through the barrier. The Guardian will need your help in Idle Portal Guardian. You need to upgrade it to the maximum, acquiring all the available improvements and updates.