ZOE2. Hands. Down. One of my absolute favorite top 5 games I think everyone should play. It's all kinds of amazing. What other game has hundreds of on-screen enemies for you to take down while trying to defend a bunch of your own units? Or lets you do an aerial combat run against 5 huge battleships that are armed to the teeth or chase after a train trying to blast your way to the front before it reaches the end of the tunnel?