
Boulder Dash
Dig through dirt to collect gems and reach the exit before boulders find you.
Independent browser adaptation · Not an official releaseSign in to save your scores and play history, or keep playing as a guest. Recent game activity and scores appear on the homepage with a masked email or IP address.
Keyboard & touch controls
How to play Boulder Dash
Dig through the dirt
Move into a dirt tile to carve it away and pass through. Dirt is also the cave's scaffolding - It is often the only thing holding a boulder over your head.
Mind what is above you
The moment a boulder loses its support, it falls. A falling boulder is lethal; a resting one is just a wall - So always check the ceiling before you dig the floor.
Watch boulders roll
Boulders do not just drop - They roll off the rounded tops of other boulders and gems when there is space beside them. One dig can start a slide three tiles away.
Fill the gem quota
Each level shows how many gems you need. Collect that many and the exit opens - Everything past the quota is profit, if you live to spend it.
Beat the clock to the exit
Every cave is timed. When the quota is met, weigh each extra gem against the ticking seconds, and reach the exit before zero or the run ends where you stand.
This independent browser adaptation uses the original game’s established title. It is not an official publisher release or an original ROM. Its artwork, tuning and controls may differ from other games with similar rules. Guest personal bests stay in this browser. Signed-in players can also save scores and play history to their private dashboard; there is no global leaderboard. Read about controls and local storage.
Choose a related challenge
Digging can remove the support beneath a boulder. Bomberman also changes its maze, but a bomb’s blast opens passages, making a planned retreat essential.
What Boulder Dash is like to play

Boulder Dash hands you a cave full of dirt, a pocketful of ambition, and physics that do not care about either. Dig tunnels to reach the gems, but remember: every boulder in this cave is held up by something, and that something is often the dirt you just removed. Boulders fall the instant they lose support, roll off rounded edges, and flatten careless miners. Each level sets a gem quota - Hit it and the exit opens - And a timer that turns tidy plans into scrambles. The tension is glorious: dig slow and the clock eats you, dig fast and the ceiling does. Our version keeps the classic tile-by-tile physics crisp on keyboard or swipe, and chains levels with rising quotas. Every restart carves a new cave with new boulders and new gems - See whether you walk out richer than you did last time.
Boulder Dash at a glance
| Genre | Puzzle Games |
|---|---|
| Challenge | Physics puzzles at pickaxe speed |
| Pace | Deliberate - Until gravity isn't |
| Original era | 1984 (Boulder Dash era) |
| Players | Single player |
| Controls | Arrows / WASD, Swipe (mobile) |
| Cost | Free, with no account and no download |
Where Boulder Dash came from
Boulder Dash arrived in 1984 from Canadian programmer Peter Liepa, who built it with Chris Gray and published through First Star Software. Starring a twitchy miner named Rockford, it debuted on Atari 8-bit computers and introduced something genuinely new: a cave where physics was the puzzle, every boulder obeyed simple gravity rules, and the player's own digging caused most of the disasters.
Its arcade cousin was Namco's Dig Dug (1982), which had players tunnel through dirt and drop rocks on pursuing monsters - But Boulder Dash inverted the idea, making the rocks the monsters. The formula was so sturdy that it traveled backward into arcades, spawned the Boulder Dash Construction Kit in 1986, and seeded a whole lineage of dig-and-dodge classics, from Repton on the BBC Micro to Emerald Mine and Supaplex on later machines.
Four decades on, cave-mining physics remains a perfect browser game: readable rules, instant restarts, and disasters that are always your fault. Boulder Dash keeps the falling, rolling, quota-chasing heart of the genre and carves a new cave every restart, so the rocks above you are never quite where you left them.
Ways people play Boulder Dash
- Boulder Dash originals
- The First Star classics and their official sequels - Pure cave sets where every screen is a hand-built physics riddle.
- Construction Kit caves
- The 1986 kit let players design and share their own caves, making Boulder Dash one of the earliest games with a true level-editing community.
- Repton
- The 1985 BBC Micro strain, beloved in Britain for meaner puzzles, tighter quotas, and a lizard hero with no patience for sloppy digging.
- Emerald Mine and Supaplex
- The Amiga and PC descendants that layered in new objects and logic - Proof the falling-boulder rulebook could carry hundreds more levels.
Boulder Dash questions and answers
What makes boulders fall?
Gravity plus your shovel. A boulder drops the instant nothing is beneath it, and it rolls sideways off rounded objects like other boulders and gems when a gap opens beside them.
Can I outrun a falling boulder?
Sideways, often; downward, never. You can dash under a boulder before it starts to fall, but once one is dropping in your column, the only winning move happened two tiles ago.
How does the exit open?
Collect the level's gem quota and the exit unlocks. Reaching it before the timer expires completes the cave and sends you deeper, where quotas grow and layouts get meaner.
What happens when the timer runs out?
The run ends on the spot, gems and all. The clock is deliberately the cruelest hazard in the cave - Boulders you can outsmart, but time only ever falls.
Is dirt dangerous?
Dirt itself is harmless - It is the removal that bites. Every tile you clear changes what the cave's boulders are resting on, so think of digging as editing the level's physics.
Do gems ever fall like boulders?
Yes - Gems obey the same gravity, falling and rolling when their support goes. A falling gem is just as deadly as a boulder, which feels deeply unfair and absolutely is.
Is the cave layout the same every run?
No. Each restart digs a new cave with new gem seams and new boulders overhead. Nerve and route craft transfer between runs; a memorised tunnel does not.
Can I play Boulder Dash on my phone?
Yes. Swipe in any direction to move and dig, exactly as the arrow keys work on desktop. Careful thumbs survive longer than fast ones.
If you like Boulder Dash, try these next
Four games from the same shelf, each with its own pace. The one-line summaries are how their own pages describe them.
| Game | What it is like | Pace | Play |
|---|---|---|---|
| Bomberman | Your best weapon is also your worst enemy. | Fuse-length chess | Play |
| Maze Escape | The exit glows. Everything else is fog. | Bigger maze, same dying clock | Play |
| The World's Hardest Game | The drones are polite. They take turns crushing you. | Inch forward, sprint, regret | Play |
| Pac-Man | Clear the dots, dodge the ghosts, own the maze. | Power pellets flip the chase | Play |

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Plan around moving ghosts, blast lines, falling rocks and the cost of a timed detour.
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