Key Defence is a unique puzzle-based tower defense game designed for Windows. Unlike traditional tower defense games where players place towers to combat enemies, Key Defence challenges players to manipulate the path that enemies take. The objective is to strategically design the path so that towers can effectively eliminate all incoming enemies. This innovative gameplay mechanic adds a fresh twist to the genre, requiring players to think critically about their route planning and tower placement.

The game offers an engaging experience with various levels that increase in complexity, demanding more strategic thinking as players progress. Players must consider the strengths and weaknesses of different towers while also anticipating enemy movements. With its focus on path manipulation and tactical planning, Key Defence delivers a compelling puzzle experience that stands out in the tower defense category.