For the uninitiated, the Creeper World series is, in essence, a slow-paced war of attrition RTS. Very much sci-fi and set in the distant future, you are fighting a constant battle of many territories with the "creeper", a mysterious substance which is emitted from various places over each map and threatens to engulf everything. Contact with it is death. At your disposal is a wide variety of gradually-introduced buildings, weaponry and various other interesting tools which are all designed to hold off the creeper's advance, and eventually fight it off and eradicate it.
I absolutely love these games. The pace is sedate and you are encouraged to come up with interesting strategies to tackle the enemy on each map. Gameplay consists of getting an energy network up and running, protecting it, and then slowly expanding further into the map. The creeper is utterly relentless (and has a number of interesting tricks up its sleeve too) and it's a thrill when you barely have the resources to just hold it off, while looking for any way you can to make a beach head and start the counterattack. New buildings and weapons are introduced as you get deeper into the campaign and they always allow for newer, interesting play styles. The story is also pretty interesting, and even better, non-intrusive, comprising as it does of a few small paragraphs of text bookending every mission.
I could gush for hours about the brilliance of these games, but you don't have to take my word for it - the above Steam link has a demo available. Myself, I will click buy the moment it goes live.
