Blocked is a single-player sliding-block puzzle title that was made for Apple mobile devices such as the iPhone and iPod Touch. The game belongs to a family of logic puzzles in which the objective is to move pieces within a confined grid so that one particular piece can exit through an opening. Its simple presentation and short, challenging levels made it a compact pastime on portable devices.

Gameplay and mechanics

Typical levels present a rectangular grid populated by rectangular tiles or 'blocks' that can move only along one axis: horizontally or vertically. The player slides these blocks back and forth to clear a path for the designated goal block. Levels vary in size and complexity, often increasing the number and arrangement of blockers and sometimes introducing immovable obstacles.

Controls and interface

On touchscreens the controls are intentionally minimal: tap and drag or swipe a block to slide it along its permitted axis. The interface usually shows a top-down view of the board and offers restart or undo options. Time or move counters may appear to encourage more efficient solutions but are not required to complete a level.

Origins and influences

The gameplay concept traces back to classic sliding-block puzzles and has parallels with the popular board game Rush Hour as well as many digital variants such as Unblock and their descendants. Mobile adaptations like Blocked distilled this idea into short puzzles well suited for picking up and playing in brief sessions.

Strategy and examples

  • Work backwards from the goal: identify which pieces must move to create a direct route.
  • Minimize unnecessary moves; use undo to explore alternate sequences.
  • Create temporary space by shifting peripheral blocks, then exploit that space to reposition central pieces.

These general tactics apply across many levels: planning ahead and recognizing repeating patterns are the keys to solving more complex boards.

Legacy and distinctions

As a mobile puzzle, Blocked is representative of a genre that emphasizes quick logic and spatial reasoning over graphics or story. While many similar apps exist with different level sets and polish, titles like Blocked helped popularize sliding-block puzzles on early touchscreen devices. For additional information or to locate a specific release, see the app listing: Blocked on the App Store.