Haak is a Metroidvania-inspired action-platformer, allowing you to explore the apocalyptic wasteland. During the process of exploration, you need to develop your skills, fight with the mysterious organization entrenched in this world, solve various mysteries, and embrace the world's ultimate secret.

The game takes place in a world ravaged by disaster. The once glorious city has been reduced to ruins, and the survivors struggle for survival. In the south, a land called Sanho has mostly remained unaffected by the calamity due to its unique geographical environment and has grown into something of a sanctuary. The protagonist, Haak, is a traveler from a small northern town. He chose to leave his home and ventured south to survive.