Sputnik Blitzkrieg is a tower defense game featuring 3 enemy types at 5 levels each, 30 levels in all and 10 weapon upgrades; rifle, plasma cannon, shotgun, minigun, rocket launcher, pulse beam, laser canon, EMP grenades, rocket pods and autorepair device. The goal of the game is to survive all 30 enemy waves so your satellite can broadcast the information it needs to.
Use the mouse to aim and click and hold the left button to shoot. If you destroy two or more enemies in under one second, your combo counter will be incremented, multiplying your score. At the end of the game, you can then submit your score to the highscore table. While in game, you can switch between weapons if you bought any using the keys 1 through 8. You can also pause by pressing P, toggle music with M and toggle sound with S. At the end of an enemy wave, you'll receive some credits and the weapons store will be shown. You can upgrade your weapons or armor up to level 5 or repair your damages, as well as buy other weapons. New weapons will be available for purchase as you defeat more enemy waves.