Crystal Quest

The objective of Galaga is to score as many points as possible by destroying insect-like enemies. The player controls a starfighter that can move left and right along the bottom of the playfield. Enemies swarm in groups in a formation near the top of the screen, and then begin flying down toward the player, firing bombs at the fighter. The game ends when the player's last fighter is lost, either by colliding with an enemy or one of its bullets, or by being captured. Galaga introduces a number of new features over its predecessor, Galaxian. Among these is the ability to fire more than one bullet at a time, a count of the player's "hit/miss ratio" at the end of the game, and a bonus "Challenging Stage" that occurs every few levels, in which a series of enemies fly onto and out of the screen in set patterns without firing at the player's ship or trying to crash into it. These stages award a large point bonus if the player manages to destroy every enemy. Another gameplay feature new to Galaga is the ability for enemies to capture the player's fighter. While the player is in control of just one fighter, a "boss Galaga" (which takes two shots to kill) periodically attempts to capture the fighter using a tractor beam. If successful, the fighter joins the enemy formation. If the player has more lives remaining, play resumes with a new fighter. The captured fighter flies down with the enemy that captured it, firing upon the player just like normal enemies, and can be shot and destroyed. The player can free the fighter by destroying the boss Galaga while in flight, causing the captured fighter to link up with the player's current fighter, doubling his or her firepower but also making a target twice as large. Galaga has an exploitable bug that can cause the attackers to stop firing bullets at the player, due to a coding error. In addition, similar to the famous "Split-Screen bug" in Pac-Man, a bug exists in Galaga in which the game "rolls over" from Level 255 to Level 0. Depending on the difficulty setting of the machine, this can cause the game to stall, requiring that the machine be reset or power-cycled in order to start a new game.

Geometry Wars: Retro Evolved 2 contains six different game modes: Deadline, King, Evolved, Pacifism, Waves and Sequence. Multiplayer was introduced in this sequel.

The much anticipated sequel to the #1 casual game of 2005, LUXOR 2 sets the new standard for action-puzzlers. LUXOR 2 takes you on a beautiful voyage through 88 all-new, gorgeously rendered levels set amongst the pyramids of ancient Egypt. Use your mystical winged scarab to shoot and destroy the approaching magical spheres, and to help you shoot them down, Luxor 2 features more explosive power-ups than ever before.

The legendary hit arcade shooter returns with Galaga Legions DX! Featuring a new twist on the classic gameplay, slick new graphics and devastating weapon power-ups, the fate of the galaxy lies in your hands! Board your fighter and prepare to defend Earth from wave after wave of relentless aliens. Target your enemies' critical weak spots to earn bonuses and rack-up an astronomical score! Blast your way through unique levels and epic boss battles on your mission to defend the galaxy and prevent an intergalactic catastrophe!

Tempest is a 1981 arcade game by Atari Inc., designed and programmed by Dave Theurer. It takes place on a three-dimensional surface, sometimes wrapped into a tube, which is viewed from one end and is divided into a dozen or more segments or lanes. The player controls a claw-shaped spaceship (named Blaster) that crawls along the near edge of the playfield, moving from segment to segment. Tempest was one of the first games to use Atari's Color-QuadraScan vector display technology. It was also the first game to allow the player to choose their starting level (a system Atari dubbed "SkillStep"). This feature increases the maximum starting level depending on the player's performance in the previous game, essentially allowing the player to continue. An official port was released for the Atari ST. An official port that bears the Atari logo was released by Superior Software for the BBC Micro and Acorn Electron in 1985, and another by Electric Dreams for the ZX Spectrum and Amstrad CPC in 1987. Versions for the Atari 2600 and 5200 were in the works in Atari, Inc. during 1984, and unfinished prototypes exist for both of them.

Mutant Storm progresses over 89 levels of twin-stick shooter mayhem! As you get deeper, you are ever more overcrowded with nasty beasties. This carnival of frenetic fun is showcased in a cutting edge graphics extravaganza.

Galaga Legions is an Xbox Live Arcade exclusive video game created by Namco Bandai Games. The title was developed by the same team who created Pac-Man Championship Edition. This game is also included in the Namco Museum Virtual Arcade collection, and in Pac-Man & Galaga Dimensions for Nintendo 3DS. A DX version of the game was released on Xbox Live Arcade as part of the Namco Generations series on June 29, 2011, with the PlayStation Network version released in August 2, 2011.

In 1983 Bally midway released the follow up to the original Tron game titled Discs of Tron. In Discs of Tron the game recreates the disc fighting sequence of the movie where you progress through different platforms in a disc battle against the evil enemy Sark. Once again players utilize an 8-way joystick for moving with one button for firing and a rotary dial for controlling the direction of the fire.

Battle through line after line of the emperor's minion horde, destroying absolutely everything you can! Blast through bunches of robots, crush colonies of aquatic monsters, smash swarms of UFOs, and demolish devastating bosses. It's a continuous adventure through four immense, strikingly vibrant worlds, and you can fight alone or join forces with a friend in two-player cooperative mode.

A top down shooter.