Inertia Gem Slide Unblocked

Inertia Gem Slide is a puzzle about momentum. A green ball sits on a grid of walls, gems, mines and odd broken-circle squares, and when you send it rolling it will not stop until something stops it. That means every move commits you to an entire line across the board, gems and dangers included. Based on an old Windows game by Ben Olmstead and rebuilt as Inertia for Simon Tatham’s puzzle collection, it plays unblocked here with mouse, keys or touch. It rewards looking ahead more than any quick reflex.

Reading the Board

There are only five kinds of square to learn:

Square	What it does
Gray raised block	A wall. The ball stops on the square just before it.
Broken circle	A stop square. The ball halts on it from any direction.
Cyan diamond	A gem. Collected as the ball passes, and it does not slow down.
Black spiked ball	A mine. Rolling over it ends that move in an explosion.
Empty	The ball rolls straight across.

You can push the ball in eight directions: the four straight ones and four diagonals. The status bar counts gems left. Hit zero and it reads COMPLETED, unless your last gem and a mine fall on the same roll, in which case the mine wins.

Inertia Gem Slide controls

To do this	Keyboard	Mouse	Touch
Roll straight up, down, left or right	Arrow keys or number pad 8, 2, 4, 6	Left-click on the grid in that direction from the ball	Tap on the grid in that direction from the ball
Roll on a diagonal	Number pad 7, 9, 1, 3	Left-click diagonally away from the ball	Tap diagonally away from the ball
Take the step the hint arrow shows	Space	—	—
Undo (works after a mine too), redo, fresh grid	U / R / N	Undo move, Redo move and New game buttons	Undo move, Redo move and New game buttons

Planning a Clean Route

The best way to improve is to stop thinking in single squares and start thinking in landing spots.

1. Trace each roll to its end. Before you press anything, follow the line out until the first wall or stop square. Check every square along it for a mine.
2. Treat stop squares as stations. They are the only places in open space where you can rest. Many solutions hop from one station to the next.
3. Remember diagonal gaps. Two walls that only touch at their corners leave a gap a diagonal roll can slip through. It is easy to miss.
4. Grab dead-end gems last, or with an exit planned. A gem tucked against a wall may leave the ball stuck somewhere with no safe roll out.
5. Use the hint arrow wisely. Solve shows the next step toward the remaining gems. Press Space to take it, or just use it to check your thinking.

If you hit a mine, Undo takes you back. The game still counts the death, so a no-death run is a fair personal goal.

Who Will Enjoy It

People who like chess-style lookahead without an opponent tend to love this. There is no clock and no score beyond your death count, so it works for relaxed thinking time. Bigger custom grids get properly tricky. If you like sliding movement puzzles, try Fifteen Slide, or browse the rest of our puzzle games.