>"Creeper World is cursed with an off-putting name that makes it sound like a theme park for pervs, but it is in fact a long-running series of elaborate tower defence games, the fourth of which appeared at the tail end of last year. I've overlooked them until now, which was absolutely a mistake. I have learned my lesson while drowning in an unstoppable wave of blue goo.Here's the deal: there's a big ol' undulating mass of weird sci-fi fluid ready to swallow everything up, and through the power and science and guns—mostly guns—you'll need to try and stop it. Your enemy is more like a force of nature, tirelessly swelling and rising until everything is trapped within a fluidic prison. But you can still hurt [it.At](http://it.At) the start of the campaign—which really just serves to prepare you for custom maps and daily challenges—you only have a couple of things to worry about. You can plonk down cannons powered by your growing network of power lines and pylons to push back the tide, with each strike clearing a bit of goo and giving you more space to build, until you've cleared paths all the way to your objectives. It's straightforward and methodical, and while the Creeper flood is a ceaseless adversary, rising up from multiple sources to surround you, fighting back is unexpectedly soothing."