This is a homebrew game for 1980's era Atari 8-bit XL/XE (NTSC/PAL) computers.
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Altirra
AtariAge
Quadbination is a 1-4 player cooperative/competitive matching paddle game.
The cooperative goal is to solve the combination as quickly as possible.
The competitive goal is to achieve the highest individual player score.
Atari 8-bit, 64KB RAM, NTSC or PAL
Single and/or Double Paddles in Port 1 and/or Port 2
Briefly press the paddle button to enable a player.
Each player is assigned a unique color.
Press and hold down any paddle button for 3 seconds to start a 2 minute game.
Each colored player is randomly assigned a combination digit, a hexadecimal value from 0 to F.
As a player falls towards the combination dial they may move using their paddle.
When a player reaches the combination dial the digit is entered and the player regenerates at the top of the screen.
Turning the paddle left will move the player to the left.
Turning the paddle right will move the player to the right.
Holding the paddle button increases the player's falling speed.
(Paddle may need service if a player does not move smoothly left and right without jitter.)
When a combination dial digit matches the digit directly below, the combination digit is green, else it is red.
A bonus item appears periodcally.
If a player touches the bonus item then it will explode in the same color as the player and at least 1 second is added to the countdown clock.
If time runs out or the combination is solved (all green) then the game ends.
Each player starts with 200 points.
Touch the bonus item, gain 30 points.
Set an unset combination dial digit correctly, gain 10 points.
Set an unset combination dial digit incorrectly, lose 20 points.
Update a set combination dial digit correctly, gain 2 points.
Update a set combination dial digit incorrectly, lose 4 points.
When the game ends, for each correct combination dial digit matching player's color, gain 20 points.
When the game ends, for each incorrect combination dial digit matching player's color, lose 20 points.
Minimum player score 0.
Maximum player score 9900.
High score for each player is tracked.
The team starts with 9000 points.
For each second during countdown, lose 75 points.
When the game ends, for each second remaining up to 99, gain 75 points.
Minimum team score 0.
Maximum team score 9900.
High team score is tracked.