Popular games for platform Sinclair ZX81

Bob Smith's interpretation of Atari's 1979 arcade game 'Asteroids'.

An unofficial port of Atari's Centipede made by Jeff Minter in the early years of Llamasoft.

QS Scramble is a clone of the arcade game Scramble. It's a side-scrolling shooter where the player controls a space craft flying over the surface of an alien planet. Movement is limited to moving up and down and there are two weapons to attack with: forward going missiles and bombs that are dropped onto ground targets. Five missiles can be fired at a time and three bombs can be dropped at a time. Targets include aliens that swoop down from above and rockets that launch from the ground. On the ground there are also fuel dumps. The game goes on until the player has lost all three lives or the fuel runs out.

Asteroids (Silversoft) is a clone of the Arcade version which sees your craft in the middle of an asteroid field and you must destroy all the asteroids to survive. The asteroids start off large and when you shoot one then it splits into two, and shooting an asteroid this size splits it into two again before being destroyed with another shot. Occasionally an alien craft appears moving across the screen and this can be destroyed for extra points. If you are hit by an asteroid or the alien craft then you lose one of three lives. You are able to turn your ship 360 degrees as well as move forward.

1K Games Pack is a collection of 11 games and programs on one tape. The collection consists of: Slot machine: You have 10p and you play a slot machine for 1p a go trying to get three numbers the same (10p) or the numbers add up to seven (5p). Etch and Sketch: This a program that allows you to draw pictures and shapes with a cursor. Slalom: Gates move down the screen and you have to align yourself to go through them without hitting them or missing them altogether. Catch me if you can: You must move an X to catch a O that moves about the screen. Space Pirate: You must attempt to dock your spaceship as it moves down the screen with another ship that moves left and right across the screen. Spacefire 1: You are on the left of the screen while the computer is on the right, firing bullets at each other attempting to hit the other player. Spacefire 2: Same as 1 but now the computer moves left across the screen. Car Crash: You must drive your car down the screen avoiding the other vehicles and the sides of the road. Man-Eating Budgies: You are on the top of the screen and Budgies move up the screen and you must avoid them while collecting their eggs. Maze: You are on the top of the screen and a maze moves upwards and you must navigate through it without hitting the walls. The Wall: You move right across the screen and you must remove every part of a wall that moves slowly upwards.

A top down view space battle against the Klingons. You can rotate your ship and fire rockets to the Klingons but make sure not to hit them. After defeating all the Klingons you can use a wormhole to go the the next galaxy. You can configure the speed and whether the Klingons move or not and you have three ships at your disposal.

A Pac-Man clone without the power ups.

Amazônia is a remake of the original Aventuras na Selva, rewritten in Assembly with more locations, more complete descriptions of each scenario, and new dangers for the player.

A Space Invaders clone where you control a craft at the bottom of the screen moving left or right, to destroy aliens in formation above dropping bombs on you.

Serra Pelada is a text-based adventure game developed by Renato Degiovani and published by the magazine Micro Sistemas, based on the peak of gold mining in Serra Pelada in the 1980s.

Clive Junior's latest invention went terribly wrong! It exploded and all kinds of parts are flying across the room! Your goal is clear and simple: Avoid the debris while running around and picking up parts to gain points!

Developed by Salvacam, this is his own version of the classic game for ZX81, with two game modes, redefinable keys and pause. In arcade mode it changes screen when you do 10 lines.

A ZX81 conversion of Ocean's Transversion, an early ZX Spectrum game. Simple, challenging and fun to play, this is a fast action game with support for the Chroma colour interface and a couple of joystick options. Features a demo mode and high score table

Three symbols appear in the centre of the screen as a vertical column and the player has to move them to one of 4 sets of 3 columns by pressing up, down, left or right. The idea is to build up lines of 3 matching symbols horizontally or diagonally to score points and gain a little time. The faster you make decisions the longer you will last, but the more mistakes you will make. The author's personal best score is 9600, can you beat that? Inspired by a video game popular in Belgian bars. Features a high score table and redefinable keys. Joysticks and Zon-X sound supported.

Inspired by the 1983 ZX Spectrum game.

Released in 1982, Adventure B: Inca Curse is the second in a series of eight interactive fiction adventures made by Artic Computing. The aim is to explore an Incan temple in order to find golden treasures. There are eight treasures and only six items can be carried in the inventory, so the correct treasures must be collected in order to leave the temple with the maximum score.

You have to take the keys and go to the exit, avoiding enemies.

Chase is somehow similar to Gnome Robots but in real-time game and with several items and power-ups.

A reboot of the Game and Watch title Helmet, with Palo T as the protagonist.

Croaka-Crawla is a clone of the arcade game Frogger where the player must control a frog and get him to the other side of a road and river. The game is viewed from above and the first thing to cross is a busy road full of traffic scrolling across the screen. You can move left, right or forward as you dodge the traffic to reach a river bank. Once the road has been survived then a river must be crossed by jumping on logs or the backs of turtles that scroll across the screen as well. Once you reach the other side of the river you must jump into a gap and occasionally a baby frog or flies appears for extra points. If you get hit by a vehicle, fall into the river, or touch the sides of the screen then you lose one of three lives. Before the game you can change the speed of the game (1-100) with 1 being the fastest.

Dodgems and Connect 4 is a double games pack that contains: Dodgems: You move a vehicle around lanes eating dots while avoiding another vehicle because if you hit it then you lose one of three lives. Your vehicle is always moving forwards but you can change lanes through openings of the lanes. Before the game you can select the speed of the game (1-9). Connect 4: A strategy game where a player either plays the computer or another player on a 7 x 6 grid dropping counters down each column. The idea is for a player to make a row of four counters in a vertical, horizontal or diagonal line to win the game.