Colony Survival is a challenging sandbox colony simulation where both your colonists and the invading monsters navigate a fully three-dimensional world. In this dynamic environment, you build bridges, tunnels, stairs, overpasses, and underpasses to direct your colonists safely while keeping the monsters at bay. Your colony begins when you plant your banner, and as you recruit more colonists, the threat from monsters increases—prompting you to construct walls, moats, and forts to defend your growing settlement.