Another Puppy game from the masters of genuine '80s retro styling. This time they turn their attention to Towers, Walls, and defending a base from a horde of Aliens.
What happens after the Space Invaders land? They advance on important human bases. How can humanity defend itself? By building towers to shoot at incoming aliens, of course!
With a simple "collect and refine" system for raising funds to keep building, and enough turret types and bonus boosts to make them work better, the levels can be tackled in various ways, and if they're too hard you can restart any level as an easier version. R+D happens between levels, with just a tad of plot and in-jokes. It's enough fun for the price, if you don't mind 8-bit style graphics (Which do really fit the general feel of teh game.)