Starship Hector

You find out you are in the middle of World War IV. Luckily for you, you are on the Starship Hector, in space. You are armed with a time machine, though, and we you do travel back, it has suddenly evolved since you last remember. It is ruled by bio-mechanical creatures, which you must battle through three lands in order to defeat that portion that needs not any wrong-doing. Fortunately, for you though, you have a laser blaster and bombs handy.