Traps

The War Mage has a wide variety of traps at his disposal when defending the rifts. These traps, as well as weapons and guardians, will be what is used to stop the orcs from reaching the Rift. Some traps are permanent, others are one use only, some will be placed on the ground while others will need a place on a wall or ceiling.

Overview of traps in Orcs Must Die![]

Name	Type	Placement	Obtained in	In Game Description	Cost	Upgrade	Upgrade Cost (Skulls)	Upgrade Enhancement
Spike Trap	Damage	Floor	The Hallway	Place on the Floor; Reset after firing	300	Poisoned Spike Trap	8	Adds a small snare to the Spike Trap
Tar Trap	Snare	Floor	The Hallway	Slows Down Enemies	400	Sticky Tar Trap	8	Slows enemies even more
Arrow Wall	Damage	Wall	The Fork	Place on the Walls; Resets after firing	600	Extended Arrow Wall	8	Extends the trap trigger range
Boom Barrel	Damage	Floor	The Corner	Blows up when Damaged	200	Super Boom Barrel	10	More Damage and a Larger Blast Radius
Spring Trap	Push	Floor	Twin Halls	Place on the Floor; Resets after firing	600	Dwarven Spring Trap	12	Reduces price to 500 coins
Barricade	Blockade	Floor	Overpass	Place as an Obstacle to Block the Enemies Path	800	Improved Barricade	12	Reduces price to 700 coins
Wall Blades	Damage	Wall	Lunch Break	Place on the Walls; resets after firing	800	Steel Wall Blades	14	Does More Damage
Brimstone	DOT	Floor	The Tower	Burns Enemies; Fades out after doing damage	700	Sorcerous Brimstone	12	Increase DoT duration
Pounder	Damage	Ceiling	The Arena	Place on the Ceiling; Resets after firing	500	Crushing Pounder	14	Applies a small stun
Steam Trap	Snare	Floor	The Stream	Place on the Floor; Levitates Enemies	400	Pressure Steam Trap	12	Reduces price to 300 Coins
Push Trap	Push	Wall	Sludge Hole	place on the Walls; Resets after firing	300	Empowered Push Traps	10	Applies a small stun
Swing Mace	Damage	Ceiling	Library	Place on the Ceiling; Resets after firing	1500	Clockwork Mace	16	No longer needs to reset between swings
Decoy	Misc	Floor	Killing Fields	Looks Oddly like you; Explodes if destroyed by enemies	700	Reinforced Decoy	10	Take more damage before exploding
Autoballista	Damage	Ceiling	Hard Climb	Automatically attacks the enemy	1000	Sniper Ballista	16	Increases attack range
Grinder	Damage	Wall	The Squeeze	Sucks in enemies that get too close; Runs constantly until it jams	1000	Self Cleaning Grinder	16	Resets less often and Resets Faster
Coin Forge	Misc	Floor	Finale	Enemies that die on this drop more coins	200	Spellbound Coinforge	18	Coinforges generate additional coins
Spore Mushroom	Misc	Floor	Stairs of Doom	Converts the first enemy that steps on it	1200	Spicy Mushroom	16	Victims of the Spore Trap are Tougher and Harder to kill
Shock Zapper	Damage	Ceiling	Artifacts of Power DLC	Ceiling mounted turret; adept at frying fliers	800	Storm Zapper	16	Holds an additional Lightning charge
Floor Scorcher	Damage	Floor	Artifacts of Power DLC	Flips up and burns groups of enemies	800	Floor Burner	16	Has a wider arc of fire

Overview of traps in Orcs Must Die! 2[]

Acid Sprayer (available to The Sorceress by default)
Archer Guardian (unlockable)
Arrow Wall (available to The War Mage by default)
Autoballista (purchasable)
Barricade (unlockable)
Bear Trap (unlockable)
Boom Barrel (purchasable)
Boom Barrel Dispenser (unlockable)
Boulder Chute (unlockable)
Brimstone (purchasable)
Coinforge (purchasable)
Decoy (purchasable)
Dwarf Guardian (unlockable)
Floor Scorcher (purchasable)
Grinder (purchasable)
Haymaker (unlockable)
Healing Well (purchasable by The War Mage)
Ice Vent (available to The Sorceress by default)
Mana Well (purchasable by The Sorceress)
Paladin Guardian (purchasable)
Pounder (purchasable)
Push Trap (purchasable)
Shock Zapper (unlockable)
Spike Trap (unlockable)
Spore Mushrooms (purchasable)
Spring Trap (unlockable)
Steam Trap (purchasable)
Swinging Mace (purchasable)
Tar Trap (available to The War Mage by default)
Void Wall (unlockable)
Wall Blades (purchasable)
Dart Spitter (unlocked with the Fire and Water DLC)
Floor Portal (unlocked with the Fire and Water DLC)
Web Spinner (unlocked with the Fire and Water DLC)
Spike Wall (unlocked with the Are We There Yeti? DLC)

Overview of traps in Orcs Must Die! 3[]

All traps in Orcs Must Die! 3 have two types of upgrades available:

Upgrades directly improving a single aspect of a trap, e.g. the amount of damage it deals or its coin cost. Normal traps have 3 tiers of these upgrades, each costing more than the one before. War machines don't have these kinds of upgrades.
Unique upgrades which change a traps behaviour. Specific challenges need to be beaten with the trap to unlock them. While every trap has two of these improvements available, only one unique upgrade can be equipped at a time.

Name	Placement	Base Attack	Cost (Coins)	Tiered Upgrade Type	Tiered Upgrades _{red = damage; orange = recharge; yellow = cost}			Upgrade Cost			Unique Upgrades		Unique cost
Acid Geyser	Floor		700	Cooldown				4	6	8	Increase Duration [+1 sec]	Increase Melt duration [+2 secs]	8
Arcane Dragon	Wall		1000	Cooldown				5	7	9	Increase Arcane debuff [+2 secs]	Projectile bounces off a wall once	7
Arrow Wall	Wall	288 dmg	600	Damage	+36	+36	+36	3	6	8	+10% Fire Damage	Piercing Arrows	5
Auto Ballista	Ceiling		750	Cooldown				4	8	10	Arcane Damage	Increase Range	6
Barricade	Floor	-	1000	+ Health; - Cost	+50hp - 50	+50hp - 50	+50hp - 100	4	6	8	Reduces Collateral Damage Taken	Increase size (+1 side block) and cost (+400 coins)	6
Boom Barrel Dispenser	Wall		1000	- Cost	- 50	- 50	- 50	5	6	7	Increase explosion radius	Decrease height explosion distance	6
Brimstone	Floor		800	Charges				3	6	9	Reduce Cooldown	Arcane Damage	6
Ceiling Laser	Ceiling		1000	- Cost	- 50	- 50	- 50	4	6	8	Adds +2 lasers	Fire Damage	7
Ceiling Pounder	Ceiling		500	Cooldown				4	6	8	Stun enemies	Increase damage against stunned enemies	6
Confusion Flower	Floor / Ceiling		700	Cooldown				4	6	8	Increase Explosion Radius	Placeable on Ceilings	7
Dart Spitter	Ceiling		900	Damage				4	6	8	Ice Damage	Increase Trap firing Duration	7
Decoy	Floor		550	+ Health				4	6	8	Increase explosion radius and damage	Bleed enemies that attack the Decoy	5
Deep Freeze	Wall		850	Damage				5	7	9	Increase range	Acid Damage	6
Flip Trap	Floor		600	- Cost	- 50	- 50	- 100	4	5	6	Reduce Cooldown	Flips Very Heavy Enemies	5
Floor Scorcher	Floor / Wall		800	Damage				4	6	8	Increase Range	Placeable on walls	8
Gravity Pillar	Ceiling		700	Cooldown				5	7	9	Deals Physical Damage	Increase Lift Duration [+2 secs]	6
Grinder	Wall	5 sec	1000	Cooldown	-1 sec	-1 sec	-1 sec	5	6	7	Slows enemies	Increase active time [+1 sec]	7
Guardian Archer	Floor		600	+ Health				4	6	9	Regenerates Health over time	Fire Damage	6
Haymaker	Ceiling		700	Damage				4	5	6	Increase Active Duration [+2 secs]	Increase knockback force	6
Molten Gold	Ceiling	30	500	Cooldown	-2 sec	-2 sec	-2 sec	5	5	5	Chance to also drop potions [30%]	Chance to drop a Big Coin [30% for Big Coin]	?
Push Trap	Wall		300	Cooldown				4	5	6	Stun enemies	Physical Damage	5
Rip Saw	Floor		900	Damage				5	6	7	Ice Damage	Reduced Cooldown	6
Saw Blade Launcher	Wall		700	Projectile Duration				4	6	8	Bleed enemies	Saw explodes on destruction	7
Shock Zapper	Ceiling		800	Charges				5	6	7	Stun enemies	Kills trigger explosion damaging enemies	6
Snow Cannon	Ceiling		1000	Targeting Range				3	5	7	Acid Damage	Reduce Cooldown	6
Spike Trap	Floor		300	Cooldown				3	6	8	Arcane Damage	Lightning Damage	5
Spike Wall	Wall		800	Damage				4	6	8	Bleed enemies	Stun enemies	8
Swinging Mace	Ceiling		1200	Damage				5	7	9	Reduced Cooldown	Fire Damage	7
Tar Trap	Floor		750	Slowdown				4	7	9	Persistent slowdown	Increased Fire Damage while on Tar	7 - 8
Wall Blades	Wall		750	Damage				3	5	7	Bleeds Enemies	Increases Damage against Stunned enemies	6
Wall Charger	Wall		1000	Damage				4	6	8	Stun enemies	Increased Damage against Electrified enemies	6
Window of Butterflies	Wall		700	- Cost	- 50	- 50	- 50	3	6	9	Arcane Damage	Confusion lasts longer	7