Game: Xenocide

The game consists of three stages (one for each moon) each with four levels. The first level of each stage requires steering a hovercraft through windshield-splattering giant alien bugs and damaging rock formations in order to reach a docking platform. You can use your hovercraft’s limited weapons to blast whatever gets in your way. Of course you will have only a certain amount of fuel to complete the job. When you reach the docking bay at the end of level one you are transported to an underground cave. The cave level is the first of two platform side-scrolling shooter levels. In the cave the objective is to find the five bombs that are going to be needed to destroy the moon when you finally make it to the bio-lab in level four. Some of the bombs are fairly well hidden and, of course, there are plenty of creatures and booby traps that will hinder your progress. You will use a jetpack to fly around the cave and will be armed with a laser and some grenades. If your jetpack runs out of fuel you die. There are a small number of refueling stations situated throughout the cave where you can not only refuel but also replenish your stock of ammo.
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" ,"Enter" and "Space bar".