I wanted to make this guide just in case anyone else, like me, was slightly confused why this is recommended as a quick 100% game. So here is a step-by-step way to the full completion:

1) Start up the game and select Hot Seat mode. This will allow you to play both sides of the battle (as if you were trading off the controls with someone else IRL). This will allow you to easily tip the scales to one side and finish a battle that would normally take 30-40 minutes in about 2 minutes.

2) You will need to be a pick a side that will be the winner each time. I chose blue simply because they are auto-selected and go first.

3) Each turn your units can move and attack stuff in range. We are only going to worry about the cannons, as they deal the most damage and move a fair amount quicker than the infantry.

4) Move your cannons up, moving other units you own aside if they are in the way and slowly attack the enemy. Refresh your units by clicking end turn twice as needed. No need to play the other side at all, unless you want to help with positioning for easier kills.

5) Eliminate all the opposing units and repeat for each level. One achievement for the first level, and the other for finishing all of them.


And it is as simple as that, enjoy your new 100%!