I've always had a thing for RTS and Tower Defense games, and so when I first found Creeper World on Kongregate, I was overjoyed. There were many different versions available freely there. Recently, I decided to purchase the third installment to see how it was.
There is much to love about this game. The game follows more or less the same rules throughout, but the final two story missions are definite game changers. I've seen many complain about losing on the second to last mission due to time constraints - I myself lost the first time around, but with a little advice I figured out how to beat it. The consistency of the gameplay can make things a little drab if you play too much, but if you enjoy one level, you're likely to enjoy a whole lot more - and there are a whole lot more. There's an practically endless array of levels once you beat most of the story. You can binge play or play a game every once in a while - either way, it will take you a long time to run out of official maps, and you'll never run out of custom ones. The game isn't all too challenging if you remember to pause frequently and keep tabs on the Creeper and your resources, but there are more difficult levels available if that's what you're looking for. The graphics are solid - nothing incredible, but well-done nonetheless.