Gradius

The dreaded Bacterion army is spreading through the galaxy like a disease, and only you can stop it from reaching the peaceful planet Gradius. Break through the Bacterion front line in your prototype spacecraft, collecting power capsules to boost the Vic Viper’s weapons to devastating levels. You’ll need every advantage you can get to emerge victorious against Zelos, the Bacterion headquarters!

- ColecoVision homebrew port of the 1985 Konami release.