Click play to load the game.
Tip: after big runs, open Menu → Export to back up your save so refreshes never wipe your progress.
In this game, you take on the role of a mining tycoon who has discovered a rich vein of gold. However, the noise of the machinery has awakened swarms of subterranean monsters.
The game is defined by its dual-task system:
It’s a high-stakes balancing act between "greed" (investing in more miners) and "safety" (investing in more towers).
The gameplay loop is divided into two primary phases that often happen simultaneously:
Your primary currency is Gold. You start with a few basic miners. You can click on gold veins or set up automated mining drills (depending on the version) to generate income. The deeper or rarer the mineral, the more gold it yields.
Monsters will approach from various paths. You must drag and drop towers onto strategic "build spots" or anywhere on the grid. Towers have different ranges, damage types, and fire rates.
As the waves progress, monsters become "tankier" (higher health) and faster. You must use your gold to:
To survive the later rounds, you need a balanced composition of towers:
| Tower Type | Damage | Speed | Special Effect |
|---|---|---|---|
| Arrow Sentry | Low | High | Great for picking off fast, weak "scout" enemies. |
| Cannon Blast | High (AoE) | Low | Deals splash damage; essential for groups of small monsters. |
| Tesla Coil | Magic | Medium | Chains lightning between enemies; ignores physical armor. |
| Frost Slow | None | Medium | Freezes or slows enemies, keeping them in the kill zone longer. |
In the early rounds (Waves 1-5), invest as much as possible into mining upgrades. If you build too many towers early on, you won't have the "compounding interest" needed to afford the expensive Mega-Towers required for Wave 50.
Don't spread your towers evenly across the map. Instead, find a bend or a "U-turn" in the path and cluster your towers there. Place a Frost Tower at the entrance of the bend to slow enemies down while your Cannons and Sentries rain fire on them.
Later waves introduce armored beetles and golems. Physical arrows will do almost zero damage to them. Ensure you have at least one or two Tesla or Magic towers upgraded by mid-game to handle these threats.
In some versions of the game, monsters will target your miners first to cut off your income. Always place a basic sentry near your mining camp to prevent a total economic collapse.
Q: Can I sell towers if I make a mistake? A: Yes, most versions allow you to sell towers for a 50-75% refund. This is useful for clearing space for more powerful late-game towers.
Q: Why am I running out of gold even though I have many miners? A: Check if your miners have a clear path to the "Drop-off Point." If the monsters are blocking the path or if the distance is too far, your gold-per-minute (GPM) will drop significantly.
Q: What is the best tower in the game? A: There is no single "best" tower, but the Cannon is generally considered the most cost-effective for mid-game waves due to its Area of Effect (AoE) damage.
Q: Is there a "Fast Forward" button? A: Yes, look for the "2x" or "3x" icon in the top right corner. Use this during early waves once your defense is set to save time.