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…Heavy gun system which strikes enemies with a powerful canister charge. What it lacks in accuracy it more than makes up for in firepower. Deadly for any opponent at short range… – in-game description

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Purchase Information
In-Game Cost 580,000 Silver
Real Value Icn info for user popup.png None
Exp Level Icn info for user popup.png 7
Hardpoint Icn info for user popup.png Heavy
Tier Icn info for user popup.png II
Base Statistics Attributes
PilotRankPrivate icon.png Level 5 Kinetic Kinetic

WeaponDamage.png Damage 8,640 per round Manual Manual

WeaponRange.png Range 500 meters Icn info for user popup.png Automatic Automatic

WeaponReload.png Reload 10 seconds Icn info for user popup.png Reload While Firing RWF

Capacity Clip: 5 rounds
Burst: 9 rounds Icn info for user popup.png

Unload Clip: 5 seconds
Burst: 9 seconds


The Thunder is a close to mid-range (up to 500 meters, with a 75-meter optimal range) heavy kinetic shotgun. It has an Alpha, Beta, light and medium counterpart (Grom, Squall, Gust and Storm respectively) and can be viewed as the kinetic counterpart to the Glory and Devastator.


This weapon is essentially a massive shotgun and is best used in close range combat, and is the heavy version of the Gust and Storm.

Despite a maximum range of 500 meters, an optimal range would be about 75 meters or less, due to the wide spread of the shells. Below 100 meters a Thunder can quickly eliminate or at the least maim a heavy robot. The Thunder is especially effective against heavy robots due to their large hit area, which allows more of the shell fragments to hit.

Even at low levels, the Thunder is a force to be reckoned with, but when upgraded to higher levels it can do appreciable damage from even 300 meters. With a fire rate of 1 RPS and the ability to reload while firing, it can do very heavy damage in a brief amount of time. Due to its RWF system (reload while firing), it can continuously fire significantly more rounds than its full magazine.

However, because the robot must get close to an enemy to do significant damage, it will be vulnerable to enemy fire at longer distances. Therefore, it is vital to take advantage of cover as much as possible to minimize damage while getting into a good engagement range (about 200 meters and under if possible.) 

Because the Thunder is a close-range gun, it is most commonly seen on fast moving medium robots since they can quickly close range. Commonly seen setups are the Thunder Schutze, Thunder/Orkan Boa, and Pinata/Thunder Vityaz. However, Carnage and Lancelot possibly are the best bots for Thunder, due to their power and rush abilities. Thunders can also be seen on Raijins, due to its Bastion ability and large health pool.

It is not uncommon to see Thunders equipped on heavy robots like the Leo or Natasha for use as heavily armored shotgun platforms which have the staying power to hold off multiple enemy robots. Even though heavier robots generally have more HP and power, they also tend to have much lower movement speeds. This makes closing distances to actually do damage a problem, although this is somewhat negated (in the case of Leo) by their very high HP, and with more than one heavy slot (in the case of Natasha), moderate damage.

The Thunder is also an effective shield-breaker. This is because it can damage energy shields even at 400-500 meters due to bullet spread, and does double damage to physical shields as it is a kinetic weapon.

However, the Thunder is quickly outclassed by due to it significantly underperforming for a heavy weapon class and role (for example Avenger has similar damage, but higher accuracy and range).

Pros and Cons


  • Very high damage at close range
  • Destroys energy shields easily (can deal significant damage even from a distance)
  • Double damage to physical shields
  • High damage per shot and good rate of fire results in very good DPS
  • Reloads while firing


  • Ineffective in mid-long range combat (300 meters or more)
  • Cannot penetrate any shield
  • Shells spread and can cause the shotgun to deal less damage than intended (especially against small robots)

Upgrade Cost

Tier 2 Mk 1
Level Upgrade cost Upgrade time
1 0 00:00
2 20,000 00:10
3 40,000 01:00
4 80,000 02:00
5 400,000 08:00
6 800,000 12:00
7 1,600,000 24:00
8 3,000,000 32:00
9 6,000,000 40:00
10 10,000,000 44:00
11 16,000,000 52:00
12 26,000,000 60:00
Totals Cost Time [DD:HH:MM]
63,940,000 10:11:10
Tier 2 Mk 2
Level Upgrade cost Upgrade time
1 0 00:00
2 500,000 05:00
3 1,000,000 10:00
4 2,000,000 20:00
5 7,500,000 30:00
6 7,500,000 30:00
7 7,500,000 30:00
8 7,500,000 30:00
9 7,500,000 30:00
10 7,500,000 30:00
11 7,500,000 30:00
12 7,500,000 30:00
Totals Cost Time [DD:HH:MM]
63,500,000 10:11:00
  • NOTE: base level starts at level 5 cost is 580,000 Silver
  • MK2 Upgrade cost 500 Gold

Weapons data

11 Thunder
In the workshop WorkshopYes.png Yes or WorkshopNo.png No WorkshopNo.png Kinetic Kinetic

Manual Manual

Automatic Automatic

Reload While Firing RWF

Particles Ammo Rate of Fire Unload Reload Shot Interval Tier Version Slot Type Trajectory
16 5 16 5 10 1 2 6.7 Heavy Kinetic Straight
MK 1 MK 2
Damage per shot Damage per magazine DPS Damage per particle Damage per shot Damage per magazine DPS Damage per particle
1 16880 84400 16880 1055
2 17200 86000 17200 1075
3 17440 87200 17440 1090
4 17840 89200 17840 1115
8640 43200 8640 540 5 18080 90400 18080 1130
9520 47600 9520 595 6 18400 92000 18400 1150
10480 52400 10480 655 7 18720 93600 18720 1170
11520 57600 11520 720 8 19040 95200 19040 1190
12640 63200 12640 790 9 19360 96800 19360 1210
13920 69600 13920 870 10 19680 98400 19680 1230
15360 76800 15360 960 11 20000 10000 20000 1250
16880 84400 16880 1055 12 20240 101200 20240 1265
MK3 Damage per shot Damage per magazine DPS Damage per particle
{{{mk3shot1}}} {{{mk3magazine1}}} {{{mk3dps1}}} {{{mk3particle1}}}

Accuracy By Distance

Below is the average percentage (%) of particles (per round) that hit an enemy robot (if aimed directly at) at specific ranges.

Range Accuracy %
50 meters or less 100%
100 meters 85%
150 meters 48%
200 meters 27%
250 meters 19%
300 meters 15%
350 meters 11%
400 meters 8%
450 meters 8%
500 meters 4%

Note: The numbers shown are based on an average-sized robot being targeted. Due to this, these percentages can be higher or lower depending on the size of the targeted robot.

Update History

Version Changes
5.8.0 Damage increased by 9%
4.8.0 Total Upgrade Time: 6 days 22 hours⟶5 days 14 hours
4.7.0 Damage increased by 5%
Total Upgrade Time: 8 days 9 hours⟶6 days 22 hours
4.5.0 Total Upgrade Cost: 63,400,000 Ag⟶31,700,000 Ag
Total Upgrade Time: 16 days 15 hours 48 minutes⟶8 days 15 hours
4.0.0 Total Upgrade Time: 16 days 16 hours⟶16 days 15 hours 48 minutes
3.2.0 Damage reduced by 5%
3.1.0 Damage reduced by 5%
Now does double damage to physical shields, along with kinetic weapons
2.5.0 Name shortened from "ECC Thunder" to "Thunder"
1.3.0 Sound effects when shooting and reloading added/changed
0.9.1 Accuracy decreased by 29%
0.9.0 Damage increased by 11.5%
0.6.3 Price changed from Au to Ag
Effective range from 300 meters to 200 meters
0.6.1 Accuracy increased by 15%
0.3.0 Weapon was added to the game



  • This weapon can fire while reloading, similar to the Gust, Storm, Dragoon, Orkan, Gekko, Pinata, Pin, Trident, ExodusFlux, Avalanche, Marquess, Hussar, Glory, Corona, Halo, and Tulumbas.
  • The name Thunder may refer to the booming noise it makes when fired.
  • Despite having a 5-round capacity, the Thunder can fire up to 9 rounds in succession when fully loaded without more than a 1-second delay. This is due to the Thunder's ability to fire while reloading.
  • There is a cylinder in the back of the Thunder that spins while reloading. This is probably a pan magazine.
  • The Thunder ejects in and out of its slot while firing- occasionally a robot will become destroyed in the middle of this phenomenon, leading to an entertaining robot corpse with a Thunder partially ejected.
  • The Thunder used to have a prefix 'ECC' until it was removed in Update 2.5
  • Some players have been angered by several damage nerfs to the Thunder in recent updates. Despite this, it has gained the ability (along with other kinetic weapons e.g. Punisher) to do double damage to physical shields (e.g. Ecu).
  • A single shot from Thunder consists of 16 individual projectiles. Unlike other weapons with multiple projectiles, they are not considered separately in the damage table.
  • The Thunder works best with tanks bots with high hp pools so you can deal massive damage while taking minor damage.
  • When shot fired, two sides at back of the Thunder will open up and sparkle will appear between it. In addition, a purple cloud of smoke emerges each time it fires.
  • The Thunder can be "bought" at a discount by purchasing a Vityaz, which costs as much as a Thunder, but also provides additional weapons and a robot which can be sold to regain a portion of spent silver in addition to saving 80,000 more silver when buying Thunder normally (The Thunder costs 580,000 silver), you can save 100,000 or more silver.