Hey, I know how much you all love netmaps, so I made some just for you! Well, I mostly made them to try out crazy crap with lua and shapes. Anyway, you can download them from simplici7y.
You're on a planet with extremely frequent meteor activity. Getting caught outside while meteorites strike the planet is extremely dangerous. Luckily the nearby facility monitors the skies very well, and sirens are in place to warn you about any incoming meteors.
You're on a spaceship near Earth that has lost control, and is now spinning wildly in space. Thinking that things can't possibly get worse, you start to get the impression that you're not alone on this ship...