Popular games for platform Sinclair ZX81

An obscure compilation consisiting of six games for the ZX81.

Cassette 50 is a compilation of 50 games that was released for a variety of 8-bit home computers, albeit with different selections of games on different computers. The majority of games within the collection were programmed in BASIC and are widely considered to be of poor quality.

Aeroporto 83 is an action shooter game developed by Renato Degiovani and published by the magazine Micro Sistemas, it is considered to be one of the first Brazilian computer games to be commercially released.

Tournament Tennis is an early tennis game featuring or even creating many conventions that would become standard features in later tennis simulations. Matches can be played at quarter-final, semi-final or final level - winning at one level automatically moves the player to the next one. They can last for 3 or 5 sets, with a player requiring a 2-game lead to win a set, though a tie-break comes in at 6–6 in all but the final set.

Fortress of Zorlac is a shoot 'em up with some similarities to Yars' Revenge. The player's objective is to rid the galaxy of a dreaded alien called Zorlac. Zorlac is positioned on the right side of the screen and is protected by a fortress consisting of three rotating walls as well as four indestructible stationary guns. The player starts out at the left edge of the screen but can move around in all directions. To be able to hit the alien the player first has to blast a hole through the three walls. It is made harder by the constant movements of both the rotating walls and the alien. At the same time the player has to avoid being hit by the defense guns which automatically lock in on the player ship. As the game goes on the fortress slowly moves toward the player who gets less space to dodge the enemy fire. Once the player has been able to hit Zorloc, he gets enraged and the game moves on to the next level that's played at a higher speed. The player scores points by destroying the walls of the fortress and for hitting the alien. Points are awarded based on the skill level chosen before a game and the player's distance from the edge of the screen. Hitting the alien is worth fifty times more than destroying a block in the fortress. The player has access to five ships and once they have all been destroyed the game ends.

Byter is a Pac-Man clone. You control a mouse, moving about a maze and attempting to eat all the dots while avoiding monsters. If you touch a monster then you lose one of three lives but if you collect one of four dollar signs then you can eat the monsters for a short time.

Damper/Glooper is a double games pack that contains the following: Damper: A city in the jungle is losing it's power due to Leeches on the grid. In this maze game you must move along the grid and damp the dotted lines which turns them solid. As you move around the grid, Leeches also move about and if you touch one then you lose one of three lives. Glooper: A Pac-Man clone where you have to move about a maze to eat all the dots while avoiding three creatures moving about the maze. If you touch a creature then you lose one of three lives but there are power-pills that can be collected and this allows you to eat the creatures for a short time.

Fantasy Games is a double games pack containing the following adventure games: Perilous Swamp: Deep in a Perilous Swamp, your quest is to find and rescue a Princess held captive by an evil Wizard before escaping out of the swamp. You are presented with a map of your surroundings and text tells you any objects you can see. As you move around the swamp you will encounter various creatures who you can fight, run from or bribe (if you have enough treasure). If you choose to fight then you decide how many combat strength points to use. Spells can be found and used to help you on your quest. Sorcerer's Island: Similar to Perilous Swamp, this time you are on an island and you must attempt to leave it. One difference is you can encounter people like the King of the Dwarves and the Grand Sorcerer himself to help you.

Games 1 is a collection of six games and programs which contains: Orbit: You control a ship orbiting a star and the further you are the slower you circle it. Also on screen is a piece of cargo orbiting the same star and you must adjust the speed of your craft by moving inwards and outwards to catch it. Sniper: A man appears on the screen in one of ten positions and you must press one of the number keys 1 to 0 where you think he is on screen. Meteors: You control a craft on the top of the screen and you must move left or right through a meteor storm that moves up the screen. Life: A program that was devised by J. H. Conway in 1970 and allows you to see a pattern come to life and hopefully grow. You place cells on a 16 x 16 grid and when you are happy with your placements you can let it come to life. Three cells adjacent to each other produces a cell, two or three neighbours, the cells survive and one or more than three cells, the cells die. Wolfpack: You control a ship on the top of the screen left or right, and you must drop a depth charge to hit a submarine below moving across the screen right to left. You only have one depth charge per sub and when the sub reaches the edge of the screen it has escaped. Golf: You must hit a ball into a hole at a random distance by selecting the range from 35 to 75.

QS Defender is a side scrolling shooter that although it is inspired by it, lacks many features of the arcade game Defender. This version is constantly scrolling left to right and there is no option to turn around and move in the opposite direction. The player can move up and down, fire and use thrust to increase the movement speed forward. There is only one enemy type and each one killed is worth 100 points. Enemies appear in waves. At the start there are just a few but as the player progresses it gets more hectic with up to eight enemies on the screen at once. The player has nine ships. When getting hit the screen goes black for a few seconds before it starts again with a clear screen and one ship less. Once all ships are lost the game has to be restarted through basic.

10 Games is a collection of games and programs on one tape. The collection contains: Klingons: You are a spaceship returning from a mining expedition and you have run into a Battlefleet of Klingons but you have no guns so with your shield you must ram them all. The game is viewed from above with you scrolling down the screen and the Klingons scrolling upwards. You receive extra points for any Battleships or Motherships that you hit. Crash-Landing: Your spaceship has been hit by a meteor and you are prepared for a crash landing on a planet with the only control you have is using your rockets. The game is text only and you see your fuel levels, velocity, height and the time. Simon: Based on the classic game where the computer shows you a sequence of colours and you have to input the same sequence. Every time you get the sequence correct, the computer adds another colour to the same sequence. Artist: A drawing program that allows you to draw pictures and shapes on the screen with a cursor. UFO: A row of UFO's sit on the top of the screen and your spaceship scrolls from the left of the screen below them, firing one shot at a time to remove parts of the UFO's. Every time you hit a UFO you score a point and you start scrolling from the left of the screen again. Missing a UFO or hitting the right side of the screen loses you points. Code: Based on the game Mastermind, the computer thinks of a 4 digit number and you have to guess it within a set number of guesses. Once you enter a number the computer tells you which number is correct in the right place and which number is correct in the wrong place. Asteroids: Your spaceship has hit an asteroid field and like the game Klingons you have no gun but instead of ramming the asteroids you must avoid them for as long as possible. Bomber: The game is viewed from the side as you watch a Bomber fly from left to right across the screen. The land is below with a dam on it and you must drop a bomb to hit the dam. Each dam that you see appears in a different location. Kaleidescope: This is program based on the toy where you see dots moving about the screen making symmetrical shapes. There is no interaction from the player. Guillotine: A two player game based on the pen and paper game Hangman but instead of saving your self from being hanged you must stop yourself from getting your head chopped off by a Guillotine. Player One enters a word and Player two has to type in letters to guess the word. Get a letter right and it appears in the word but get it wrong and a Guillotine starts to appear.

2K Games Pack is a collection of six games and programs. The collection consists of: Snail: You have $50 and the choice to bet an amount of money on one of four snails to reach the other side of the screen first. Advice: A program which gives you a statement to take as advice. Dice: You and the computer take it in turns to throw a dice and the winner is the one with the highest score after 10 throws. 31: The computer gives you a number and you decide whether to receive another one with the aim to get closer to 31 than the computer. Sketch: A program allowing you to draw pictures and shapes with a cursor. Reverse: A puzzle game where you have to put 10 mixed up numbers in order by selecting how many numbers from the left will be reversed.

Thro' The Wall also Scramble is a double games pack that contains: Thro' The Wall: A Breakout clone where you control a bat on the bottom of the screen moving left or right, to hit a ball upwards and remove bricks above. If the ball goes past the bat then you lose one of three lives. There is a choice of the speed of the ball and they are Normal, Fast and Superfast. Scramble: You view your craft from the side as it flies from left to right horizontally constantly, and you must avoid or shoot ground installations and enemy craft with your missiles. You can use a smart bomb to destroy everything on the screen but you only have one and if you hit the ground or any enemy then you lose one of three lives. You have the choice of ten speeds (1-10) with one being the fastest.

Artic Computing's take on Reversi

Asteroids (Software Farm) 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. There are three skill levels (1-3) and four players can play with each player taking it in turn when the last player is killed.

Airline is an economic strategy game, with the player taking the role of a Chairman for L-AIR, an air company whose business starts off with £3 million. He has 7 years to increase his net assets to £30 million. The player can charter, buy or sell aircraft, as well as managing staffing, maintenance and insurance. Situations in game (like hijacks, air crashes and sabotage) and costs (of fuel and aircrafts, tax demands etc.) are realistic. The graphics are simplified, made ​​up almost entirely of tables and texts.

Bat Cage is an action game where the player has to capture bats while fighting off other bats that try to rescue them. The playing field consists of a bat cage in the bottom and above it a bat flap around and there are also eight bat eggs bouncing around. The player controls a bar that can be moved around freely. It is used to capture the bat eggs which are taken to the bat cage where they can hatch. As soon as the hatching begins the bat at the top of the screen will attack and try to rescue the egg. The player then has to use the bar to fend it off. It works a bit similar to Breakout as the bat will bounce back up again when it makes contact with the bar. The player then scores points as long as the egg hatches. Ultimately the attacking bat will give up and retreat and the player can move on to the next egg that needs to be captured. As the game goes on the player will reach bonus levels and the number of attacking bats will increase. The game is over when the bats stay at the top of the screen and no longer attack when the player hatches his eggs. The game can be set to different skill levels (1-36) that alters the speed of the game.

Breakout 3 is based on the arcade game Breakout but instead of the bat on the bottom of the screen, the bat is on the left side of the screen. The aim is to hit bricks on the right of the screen to make them disappear but if you let the ball past the bat then you lose one of three lives. Before the start of the game you can choose whether to play with one or two bats, and playing with two bats has them parallel to each other a small distance apart. There are also three types of games to play and they are: Practise Game: A normal game with the choice to choose the speed of the bat (1-4) with 1 being the slowest. Progressive Game: Every time you hit the ball it speeds up and also removing a set of bricks makes the ball faster. Acceleration Game: The ball will speed up for every 10th brick disappearing and it speeds up when all the bricks have been removed.

J.D. Arcades is a collection of three games that contains: UXB: You have to move around a maze to catch four tumblers, which are numbered and must be collected in the correct order. Once you have collected them all then you must get to the detonator before a fuse reaches it. If you collect the wrong tumbler or hit the fuse then it is game over. Strategic Invaders: A Space Invaders clone where you control a base moving left or right, blasting aliens who are above in formation, moving across the screen, slowly descending downwards dropping bombs. Between your base and the aliens are shields which lose parts every time you hit one or the aliens do. One unique feature is that each position on the screen your base is on, only has nine shots. It is game over if you get hit by an aliens bomb or you allow them to land. Laser Patrol: A side view shooter where you must move a spacecraft up or down to either avoid or blast asteroids that move across the screen from right to left. if you hit an asteroid then it is game over.

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.

Aventuras na Selva is a text-based adventure developed by Renato Degiovani and published by the magazine Micro Sistemas.

Alerta Vermelho is a game where you need attack the enemy planet using the lasers and bombs you have and, at the same time, defend yourself.