Boulder Trap
Appears in Dungeon Keeper,Dungeon Keeper 2
Icon Boulder Trap Icon MediumBoulder Trap2 Icon Medium
Cost (Buy/Sell) --/1000 (DK1),
1500/750 (DK2)
Damage Extreme (DK1)
Substantial (DK2)
Number of charges 1
Mana upkeep/cost to fire 5/-
Damages your Creatures? Yes
Workshop size needed 17 tiles (DK1)
Time to craft 25000 (DK1)

Dungeon KeeperEdit

The Boulder Trap is potentially the most destructive trap available, first available to the player in Nevergrim. It allows the player to lay down a huge round rock which rolls over heroes and enemy creatures when they come within range. The trap requires a Workshop made up of at least 17 squares before it can be manufactured.

The trap is triggered when a hero or enemy creature is close to it and within its line of sight. The boulder then starts rolling towards them. When the boulder reaches a wall, it bounces off in a random direction so its path cannot be predicted. After some time, the boulder breaks up and is destroyed. It is also weakened whenever it rolls over a creature - so it might be advisable to use multiple boulder traps when a large group of enemies tries to invade the dungeon.

Should the Boulder roll onto lava it will explode, and will disintegrate if it rolls into water. Although your own creatures do not set off the trap, they can still be squashed if caught in its path so must be treated with extreme care. The player can activate the trap by slapping it, and can also redirect their own boulders if skilled enough. Note however that each slap will weaken the boulder, causing it to break more quickly. If activated this way the trap will disappear, so it cannot be sold anymore and needs to be replaced with a new one.

One must be very careful when dealing with enemy Boulder traps. If one knows the enemy has the trap available they should be very careful when breaking down doors or walking down corridors. When possible, move through suspicious areas using Imps or very fast creatures if one is more skilled to minimise damage and harmlessly activate them. If one is quick, they can place Doors in any corridors and certain types of rooms to change the landscape such as Treasure Rooms (for their columns), Hatcheries (for their lowered floor) or Temples (for their raised floors). Note however that a Boulder trap will destroy any Guard Posts and will replace them with bare earth. If one is skilled enough at manipulating the environment and their enemies, they can theoretically use the opponent's traps against them.

It should be noted that the Avatar is immune to this trap - if he gets hit by it, the boulder will simply explode.

Dungeon Keeper 2Edit

Any creature coming within the range of this trap soon witnesses the bowel-loosening rumblings of a large chunk of rock bearing down upon them. Some of the Dungeon’s swifter creatures may be able to outrun boulders, but most will be forced to side-step out of the way if they’re to avoid getting flattened.

Boulders cause damage equal to half the health of the creature that it hits and cause more damage to stunned creatures. If a creature gets hit by enough boulders, it will die. Boulders cause damage to your creatures as well as the enemies. Boulders will cause damage to Dungeon Hearts (yours will cause damage to your own) so can be used to take out enemy hearts. A boulders direction can be changed by slapping it,and it will bounce of any walls it hits as well, so beware of where you set them up. A Boulder takes damage from rolling. If you are using the patched version of the game it takes damage from slaps and from hitting creatures as well.

Note: Mining long rat runs around your dungeon creates the ideal environment for boulder traps. Though your creatures won’t set off a Boulder Trap they can still be squashed like flies if an enemy has activated a Boulder Trap. Take care of your creatures, Keeper!

Also known as the Sphere Trap.[1]


  1. ダンジョンキーパー2コンプリートガイドブック (in Japanese). p. 28. Tokyo: Keibunsha. 1999. ISBN 978-4-7669-3293-5.

Traps and Doors
Dk1iconDungeon Keeper
Alarmtrap icon tinyAlarm Trap / Bouldertrap icon tinyBoulder Trap / Lavatrap icon tinyLava Trap / Lightningtrap icon tinyLightning Trap / Poisongastrap icon tinyPoison Gas Trap / Wordofpowertrap icon tinyWord Of Power Trap
Braceddoor icon tinyBraced Door / Irondoor icon tinyIron Door / Magicdoor icon tinyMagic Door / Woodendoor icon tinyWooden Door
Cut content
Fireball Trap
Dk2iconDungeon Keeper 2
Alarmtrap-icon-tinyAlarm Trap / Bouldertrap-icon-tinyBoulder Trap / Feartrap-icon-tinyFear Trap / Firebursttrap-icon-tinyFireburst Trap / Freezetrap-icon-tinyFreeze Trap / Gastrap-icon-tinyGas Trap / Guardpost-icon-tinyGuard Post / Jackintheboxtrap-icon-tinyJack In The Box Trap / Lightningtrap-icon-tinyLightning Trap / Sentrytrap-icon-tinySentry Trap / Spiketrap-icon-tinySpike Trap / Triggertrap-icon-tinyTrigger Trap
Barricade-icon-tinyBarricade / Braceddoor-icon-tinyBraced Door / Magicdoor-icon-tinyMagic Door / Secretdoor-icon-tinySecret Door / Steeldoor-icon-tinySteel Door / Woodendoor-icon-tinyWooden Door
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