Heroine The Flame in the Flood finds himself in the middle of an American state destroyed by a natural disaster. A wide raging river runs through the abandoned lands. Along it the protagonist floats together with her faithful dog companion. The girl's waterway is randomly generated, as are the places she can visit along the way. The plot of such a journey is presented through rare NPCs, as well as through notes and environment design. The main focus is on the gameplay in the classic roguelike genre.

Each foray of the heroine of Fire in the flood is unique, and progress is reset after death. She, in turn, is able to overtake a girl for many reasons. For example, from a lack of food or drinking water, because needs need to be monitored. Another option for death is a fight with an enemy who turns out to be too tough for the protagonist. Between swims on her raft, she is allowed to dock and explore the surrounding area, where she encounters both useful resources and enemies. For example, wolves or aggressive survivors. This part of the gameplay is framed as a third-person action game. The swim resembles a runner with obstacles.

The journey begins near the forest. There it is convenient to collect basic materials for crafting, such as wood, as well as hunt animals. However, you won’t be able to stay among the trees for long. Locations replace each other and now there are bolts and metal in your pockets, and for food you have to climb into abandoned supermarkets. Because of this, some resources may be noticeably lacking after changing regions. They are spent not only on equipment, but also on improving the raft. For example, its capacity or strength.