It fixes, it dents craniums, it's the wonder tool of the century!
— Eureka Effect publicity blurb
The Eureka Effect is a community-created melee weapon for the Engineer. It is a retro-futuristic pipe wrench with a team-colored handle and an atomic symbol etched into the top of it. A spiral antenna, not unlike a Tesla coil, is attached to the head. A switch near the top of the grip is connected to a red wire that is plugged into the bottom of the antenna.
By pressing the reload key (default key: R), a menu will appear with options on where to teleport to. Choosing either destination will cause the Engineer to perform a taunt for approximately 2 seconds with the weapon, during which he hoists his wrench into the air and is struck by a bolt of lightning, causing him to be teleported directly to his chosen destination. Choosing the respawn room option moves the Engineer to an active respawn point. Choosing the Teleporter exit option will instantly move the Engineer to his Teleporter's exit, provided one has been fully built. A Teleporter entrance is not required for this option, and it will not cause the Teleporter system to need to recharge afterwards. Any player too close to an enemy's Teleporter exit as the owner teleports to it will cause a telefrag; if an enemy destroys the exit while the Engineer is teleporting to it, he will instead be teleported to spawn. Neither destination will leave the usual team-colored particle trails at the player's feet. Like any other taunt, this taunt cannot be activated if the Engineer is in midair or in water.
Additionally, the Eureka Effect allows the Engineer to construct and upgrade Teleporters at half the cost (25 metal for building the teleporter and 100 metal for upgrade per level); however, the Eureka Effect is 50% less effective at speeding up construction when striking buildings. The wielder will also receive 20% less metal from ammo pickups and Dispensers.
Using the Pip-Boy will change the GUI similar to that of the destroy and build GUI's.
Switching from this weapon to the Gunslinger will destroy the Sentry Gun the player has built. Similarly, switching to this weapon from the Gunslinger will cause the Gunslinger’s Combat Mini-Sentry Gun to be destroyed.
The Eureka Effect was later contributed to the Steam Workshop, at Valve's request.
Damage and function times
| Damage and function times
| Damage type
| Ranged or Melee damage?
| Base damage
| Damage repaired per hit
| Upgrade amount per hit
| Metal cost per repairing hit
|| 1 + damage / 3
| Metal cost for reloading ammo
|| 1 / bullet|
2 / rocket salvo
| Function times
| Attack interval
|| 0.8 s
| Values are approximate and determined by community testing.
As a crafting ingredient
|| Built to Last|
Help a single building tank over 2000 damage without being destroyed.
|| Circle the Wagons|
Repair 50,000 damage to friendly buildings constructed by other players.
|| Get Along!|
Manage to get to, and then remove, a sapper placed on your building while you were several meters away.
|| Doc, Stock, and Barrel|
Repair a sentry gun under fire while being healed by a Medic.
|| Land Grab|
Help a teammate construct a building.
|| Quick Draw|
Kill a Spy and two sappers within 10 seconds.
|| Silent Pardner|
Upgrade 50 buildings built by other team members.
|| The Wrench Connection|
Kill a disguised spy with your Wrench.
|| Rio Grind|
Perform 50 repairs and/or reloads on a Sentry gun being Wrangled by another Engineer.
December 15, 2011 Patch
(Australian Christmas 2011
- The Eureka Effect was added to the game. It allows the user to teleport to spawn via taunting at the expense of the ability to haul buildings.
December 16, 2011 Patch
- Fixed an exploit with The Eureka Effect where the effects could activate without taunting in high-lag situations.
January 11, 2012 Patch
- Added crafting blueprint for the Eureka Effect.
March 19, 2013 Patch
- Fixed the death notice icon for the Eureka Effect.
November 12, 2013 Patch
June 11, 2014 Patch #1
- Changed attributes:
- Can now pickup buildings.
- Repair and upgrade rates have been decreased (by 50%; now requires double the metal to complete either task).
- Can teleport to your spawn room or your Teleporter Exit.
June 11, 2014 Patch #2
- Updated the materials for The Eureka Effect HUD to support mat_picmip.
July 24, 2014 Patch
- Fixed a bug related to cancelling the Eureka Effect taunt and teleporting immediately.
July 2, 2015 Patch #1 (Gun Mettle Update)
- Changed attributes:
- Previous penalties have been removed.
- Construction hit speed boost decreased by 50%.
- 50% less metal from pickups and Dispensers.
August 19, 2015 Patch
- Fixed players being able to carry the jack while taunting. (fixes an exploit with the Eureka Effect)
August 27, 2015 Patch
- Fixed the Engineer losing revenge crits and picked-up weapons after using the Eureka Effect to teleport back to base.
- PASS Time update
- Fixed another case where players could teleport the jack with the Eureka Effect.
- [Undocumented] As a result of the revenge crits fix, the Eureka Effect no longer replenishes health and ammunition. Effects such as fire, Jarate, Mad Milk, etc. are no longer removed.
July 7, 2016 Patch (Meet Your Match Update)
- Changed attributes:
- Reduced "50% less metal from Dispensers and Pickups" to 20%
- Added "Teleporters cost 50% less metal"
August 29, 2016 Patch
- Fixed players being able to teleport out of the spawn room using the Eureka Effect at the beginning of a round.
September 27, 2016 Patch
- Fixed an exploit related to the Eureka Effect and carrying buildings.
October 20, 2017 Patch #1 (Jungle Inferno Update)
- Fixed Engineers using the Eureka Effect to teleport out of hell on Halloween maps.
- There are two unused particles; one of which is an idle particle designed for the tip of the electrode, the other is an impact particle.
- If the player builds a teleporter with the Eureka Effect and then changes to another Wrench, the teleporter will still have the reduced upgrade cost and vice versa.
- If the player suffers knockback during the taunt, they will teleport before the animation completes, since taunts are considered complete once interrupted.
- The player can teleport to the Teleporter exit using the Eureka Effect, even if the Teleporter is being sapped by any of the Sappers.
- The weapon's teleportation ability bears resemblance to the Instant Teleport, a scrapped secondary weapon which would teleport the Engineer to his Teleporter Exit.
- Having the Eureka Effect equipped results in the Engineer only gaining half as much metal from successful Widowmaker shots. It is unclear as to whether this is intentional.
- Eureka (word) comes from the Ancient Greek word εὕρηκα heúrēka, meaning "I have found (it)".
- The word "Eureka", is a famous exclamation attributed to the famous Greek Philosopher Archimedes.
- The name is derived from the term eureka effect, any sudden unexpected discovery, or the sudden realization of the solution to a problem.
- This weapon is called the Wrenchmotron 600 on the Dr. Grordbort's website. The Eureka Effect is listed as an "electrifying taunt" there.
The Eureka Effect teleport animation.
Steam Workshop thumbnail for the Eureka Effect.
Dialogue box to teleport.
Dialogue box to teleport with the Pip-boy equipped.
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