That One Attack: CRAWLERS. They can travel across any surface, including water. They crawl up past all your units and cause massive amounts of damage.
Vindicated by History: Due to the lack of marketing, the game initially performed very poorly and became known as a failure for Humongous. However, once the fanbase for it grew back, many longtime fans decided to go back and give the game another chance, and it now has a bigger following. It's still got a fairly small fanbase, but it's certainly much bigger than it was initially.