Most games use a "Layers" system rather than health bars. Popping a stronger Bloon reveals weaker "children" inside (e.g., a Blue Bloon contains a Red Bloon). Evolution of the Game Series
The protagonists who use darts, magic, and advanced technology to pop Bloons. Related articles: "bloons"
Released in 2018, is the most advanced entry, featuring 3D graphics and deep strategic layers. Most games use a "Layers" system rather than health bars