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… One of the most effective weapons at close range. What it lacks in accuracy it more than makes up in firepower.… – in-game description

Kinetic Kinetic


The Thunder is a close to mid-range (up to 500 meters, with a 75-meter optimal range) heavy kinetic weapon.


This weapon is essentially a massive shotgun and is best used in close range combat. Despite a maximum range of 500 meters, an optimum range would be about 200 meters or less, due to the spread of the bullets. Below 200 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 FWR system (Fire while reload), 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 the Leo) by their very high HP, and with more than one heavy slot, 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 quite a rare sight in higher leagues (Diamond and above) due to it significantly underperforming for its weapon class and role. While it remains effective in lower leagues, it isn’t advised to use Thunders beyond Diamond, as other weapon such as the Avenger perform far better.

Mark I Statistics

Purchase Information

Level Cost Damage Burst
5 580,000 Ag 7980 71820 7980 3990

Upgrade Information

Level Cost AgIcon.png Time Damage Burst
6 400,000 8 hours 8770 78930 8770 4385
7 800,000 16 hours 9643 86787 9643 4822
8 1,500,000 20 hours 10601 95409 10601 5301
9 3,000,000 1 day 11642 104778 11642 5821
10 5,000,000 1 day 6 hours 12802 115218 12802 6401
11 8,000,000 1 day 8 hours 14062 126558 14062 7031
12 13,000,000 1 day 12 hours 15456 139104 15456 7728
Cost Time
Totals 31,700,000 6 days 22 hours

  • The damage column shows the damage from all 16 particles (combined) fired from each round (out of 9 rounds)

Mark II Statistics

Purchase Information

Level Cost Damage Burst
1 500 Au 6569 59121 6569 3285

Note: Level 12 Mark I is required to enhance (purchase) to Mark II.

Upgrade Information

Level Cost AgIcon.png Time Damage Burst
2 10,000 5 minutes 7207 64863 7207 3604
3 40,000 30 minutes 7930 71370 7930 3965
4 80,000 1 hour 8719 78471 8719 4360
5 200,000 4 hours 9576 86184 9576 4788
6 400,000 8 hours 10517 94653 10517 5259
7 800,000 16 hours 11558 104022 11558 5779
8 1,500,000 20 hours 12718 114462 12718 6359
9 3,000,000 1 day 13961 125649 13961 6981
10 5,000,000 1 day 6 hours 15355 138195 15355 7678
11 8,000,000 1 day 8 hours 16867 151803 16867 8434
12 13,000,000 1 day 12 hours 18547 166923 18547 9274
Cost Time
Totals 31,970,000 7 days 3 hours 35 minutes

  • The damage column shows the damage from all 16 particles (combined) fired from each round (out of 9 rounds)

Accuracy By Distance

Range Accuracy %
50 meters or less 100%
100 meters 81%
150 meters 49%
200 meters 26%
250 meters 21%
300 meters 10%
350 meters 9%
400 meters 8%
450 meters 8%
500 meters 8%

Update History

Version Changes
4.7.0 Damage increased by 5%
Total Upgrade Time: 8 days 9 hours⟶6 days 22 hours
4.5 Economy Changes:
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 Economy Changes (July 5):
Total Upgrade Time: 16 days 16 hours⟶16 days 15 hours 48 minutes
3.2.0 Damage reduced by 5%
3.1 Damage reduced by 5%
Now does double damage to physical shields, along with kinetic weapons
2.5 Name shortened
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 Orkan, Gekko, Pinata, Pin, Trident, Exodus, Flux, 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)
  • This is the only heavy weapon to be weaker than one of its smaller counterparts (Storm)
  • 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.
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