Appears On
Sketch two cross-section curves live with the keyboard, then watch a 3D surface graph render itself across both axes from your input.
Render bold 3D block letters on screen in three sizes, drawn pixel-by-pixel from the built-in font using PLOT and DRAW geometry tricks.
Guide your explorer across treacherous arctic terrain using string-rotation scrolling, UDG sprites, and seven distinct levels of icy obstacle patterns.
Guide a rabbit through five haunted rooms, collecting bells and dodging bats in this multi-room platform game with user-defined graphics and attribute-based collision detection.
Guide a two-cell sprite through enemy-packed screens, defuse TNT against a shrinking timer bar, and grab bonus flags in this two-stage action game.
Discover how a single POKE into one system variable transforms the appearance of the input cursor through seven distinct visual styles.
Guide a cat through a crowded playfield, eating 50 mice while dodging deadly rats that multiply with every catch — how fast can you clear the board?
Navigate inside a computer, collect colored wires, and defeat the evil Cursor before your time runs out in this inventory-based text adventure.
A pixel flood-fill routine lets you navigate a pointer into any enclosed graphic region and fill it solid with a single keypress.
Guide your fish through a bubble-filled swamp, eating plankton for survival while dodging diving turtles in this arcade game with UDG sprites and a skill-level timer.
A hand-drawn color map of North America sets the scene for a state-capitals quiz that reads your answer and tells you where you went wrong.
A multi-program memory manager lets you keep a whole suite of utilities resident at once, switching between them by poking the BASIC program pointer directly.
A walking stick-figure animation that pushes the UDG system to 80 characters by swapping multiple graphics tables on the fly using direct memory POKEs.
A joystick-driven Pac-Man clone uses nine custom sprite characters, an ASCII-art maze, and a randomly wandering ghost to challenge your dot-eating reflexes.
A two-way vocabulary quiz lets you drill word pairs in either direction, tracking which words you've already answered to avoid repeats within a round.
A two-way vocabulary quiz lets you drill either direction through a word list, tracking each answer to avoid repeating questions within a round.
An interactive Spanish tutor automatically conjugates any regular verb you enter and teaches suffixes, opposites, and question words with scrolling example sentences.
A full-screen text editor with search-and-replace, justified output, printer support, custom typefaces, and 21 user-defined graphics — all in pure BASIC.
Build and solve your own word search puzzles with this BASIC program that places words in eight directions across a 20×20 letter grid.
A four-wagon race betting game where random movement, time bonuses, and five taunting replay messages keep the excitement going until your money runs out.
