In River Tiles your objective is to save as many villages as possible from flooding by directing the rivers to the sea.

You do this by placing tiles on the board with tiles from the stack, one at a time, you cannot replace a tile with another of the same type.

Tile Types

Forest: This blocks the passage of water, use them to protect villages.

Grass: Use this tile to direct the flow of water towards the sea.

Village: What you're protecting, these need corn and access to another village to survive after the flood. Village tiles will pulse if they are in danger.

Corn: One corn per village is required for survival, otherwise they act like Grass tiles.

Mountain: This is a river source, when the flooding begins this is where the flow starts.

Ocean: The river needs to be directed towards this tile, if both rivers don't reach this tile everything is lost.

Water: This tile can't be placed on the board, it is put aside and when a total of 4 are acquired flooding begins.