From publisher blurb:
The Convergence War is a six-part crossover adventure in the worlds of G.I. Taskforce, Robot Defenders, Power Commandos, and Optionally Magical Friendship Ponys. This manual gives you a background on the Convergence War, the Entities and a complete setup to utilize crossover adventures presented in this book and should you design your own. Because the Convergence War deals with multiple dimensions, you have an infinite number of worlds to create and explore beyond describes in the series.
In Part One: Staging Ground, an introductory adventure that brings the characters together and has them take part in a mission like the ones they will encounter through the series. In Parts Two through Five (other books), the adventures are four distinct descriptive worlds with an adventure attached to them. In part 6, a final battle between Entropy and Syntropy occurs, and the Heroes are in the middle. Finally, the Appendix contains the unique enemies, NPCs, vehicles and rules associated with the adventures.
This book contains information on how to run the series, an introductory adventure, write ups for new creatures and new rules.
This source book and adventure is designed for High-Tier level Teen Heroes and is compatible with properties using Essence20 system. It may also be adapted for any systems such as Mutants and Masterminds or 2D20 powers system with some modifications. An Appendix contains stats for the Essence20 enemies and additional rules which are Open Content.