Tempest

The game takes place on a three-dimensional surface divided into lanes, sometimes as a closed tube, and viewed from one end. The player controls a claw-shaped "blaster" that sits on the edge of the surface, snapping from segment to segment as you move left and right.
The goal in Tempest is to survive for as long as possible, and score as many points as possible, by clearing the screen of enemies that appear on the playing field.
The player's blaster can rapid-fire shots down individual lanes of the field, destroying any enemies within the same lane. The blaster is also equipped with a "Superzapper" which, once per level, destroys all enemies currently on the field. A second use of the Superzapper in the same level destroys one random enemy, and the Superzapper is recharged between each level.
The game features sixteen unique levels of different shapes, including simple geometric shapes, a flat line, and the symbol for infinity. Some levels are closed tubes that allow the player to loop throughout it continuously, while others have definite left and right endpoints. When all sixteen levels have been played, the sequence repeats with a different color scheme and higher difficulty. One set of levels (65 through 80) is "invisible" (black). After reaching Stage 99, the level counter stops increasing and each successive level shape is picked randomly.
Enemies first appear on the screen as swirling dots beyond the far end of the field, appearing on the field one at a time. There are seven types of enemies in the game, each with their own behavior pattern. Flippers attempt to catch the player's blaster and drag it to the far end of the playfield. Pulsars periodically electrify the lane that they occupy—if the blaster is in that lane at that moment, it is destroyed. Fuseballs jump forward and back unpredictably along the edges of each lane, moving slowly between them to give the player a brief opportunity to shoot them. Spikers roll toward the player and extend spikes into a lane, which the player can wear down by shooting it. After the first few levels, each level starts with short spikes at the far end of the field. Later levels also feature Fuseball and Pulsar Tankers, which split into two Fuseballs or two Pulsars when hit, respectively. Most enemies can shoot bullets at the blaster, destroying it upon impact.
When all enemies on the field have been destroyed, the player "warps" to the next level by traveling down the field and into the space beyond it. The player must avoid or destroy any spikes that are in the way; hitting one will destroy the blaster and force the player to try the warp again.
The player loses a life when their blaster is destroyed or captured, and the game ends when all lives are lost. Bonus blasters (up to six at a time) are awarded at certain score intervals.