The document describes the development of an educational STEM game called "Invasion!" about invasive Asian carp in waterways. It was created by a graduate student project team to raise awareness of this issue. The game uses a tower defense and card mechanic to simulate managing the complex socio-political factors around controlling the invasive fish population over multiple turns and outcomes. The document outlines the gameplay, iterative design process, and goals of promoting systems thinking and teaching about ecology and biology through interactive gameplay that reflects the real-world complexity of the problem.