2048

Sliding tile puzzle game

puzzlearcadecasual

Mastermind

Classic code-breaking logic game

puzzleclassicstrategy

Minesweeper

Classic minesweeper with ASCII graphics

puzzleclassiccasual

Sudoku

Classic Sudoku puzzle

puzzleclassiccasual

Wordie

Guess the 5-letter word in 6 tries

wordpuzzlecasual

CTF: Capture the Flag

Master the command line one concept at a time. Graduated puzzles teach navigation, text processing, and shell mastery.

puzzleeducationaladventure

Hackerman

Timed infiltration simulation

puzzlesimulationadventure

Regex Golf

Match A, reject B, fewest chars wins

puzzleeducationalcasual

Shell Wars

Shell challenges: solo time trial or PvP CTF duel

competitiveeducationalpuzzle