The game, regardless of mode, leaves the player with a small base with two power generators and three power links. The player would then use the starting money to begin mining operations and setting up defensive lasers. Depending on the game mode, various waves of aliens will approach. The player can build lasers and missile turrets to destroy them. The player can increase the power of a single laser by linking it together with others. This yields a more powerful beam at the expense of the total number of lasers. The missile turrets can be upgraded to either a long range cruise missile that will swarm targets, or storm missiles which have an area of effect but smaller alien detection range. The game also features a "creative mode", in which various modes can be emulated, as well as enabling "Infinite Money" to creatively construct a base without limitation. Creative mode also allows instant placement of enemy ships to test out defenses.