Simon Tatham's Portable Puzzle Collection - 1-player puzzle games

 Simon Tatham's Portable Puzzle Collection contains a number of popular
 puzzle games for one player. It currently consists of these games:
 .
  * Black Box, ball-finding puzzle
  * Bridges, bridge-placing puzzle
  * Cube, rolling cube puzzle
  * Dominosa, domino tiling puzzle
  * Fifteen, sliding block puzzle
  * Filling, polyomino puzzle
  * Flip, tile inversion puzzle
  * Flood, flood-filling puzzle
  * Galaxies, symmetric polyomino puzzle
  * Guess, combination-guessing puzzle
  * Inertia, gem-collecting puzzle
  * Keen, arithmetic Latin square puzzle
  * Light Up, light-bulb placing puzzle
  * Loopy, loop-drawing puzzle
  * Magnets, magnet-placing puzzle
  * Map, map-colouring puzzle
  * Mines, mine-finding puzzle
  * Mosaic, grid-filling puzzle
  * Net, network jigsaw puzzle
  * Netslide, toroidal sliding network puzzle
  * Palisade, grid-division puzzle
  * Pattern, pattern puzzle
  * Pearl, loop-drawing puzzle
  * Pegs, peg solitaire puzzle
  * Range, visible-distance puzzle
  * Rectangles, rectangles puzzle
  * Same Game, block-clearing puzzle
  * Signpost, square-connecting puzzle
  * Singles, number-removing puzzle
  * Sixteen, toroidal sliding block puzzle
  * Slant, maze-drawing puzzle
  * Solo, number placement puzzle
  * Tents, tent-placing puzzle
  * Towers, tower-placing Latin square puzzle
  * Tracks, path-finding railway track puzzle
  * Twiddle, rotational sliding block puzzle
  * Undead, monster-placing puzzle
  * Unequal, Latin square puzzle
  * Unruly, black and white grid puzzle
  * Untangle, planar graph layout puzzle