It is often used as a reserve weapon, as it has a low amount of ammunition and a moderately slow reload. It can only be reloaded when the entire magazine is empty, except in the single player campaign mission Numbers, where one can execute a partial reload. Because of this, it is advised to shoot any extra rounds in a magazine before obtaining a Max Ammo. Wasting ammo on one zombie is not advised. It is also a decent weapon against Hellhounds as it can easily take large numbers of them out and will always kill them in one hit. Since the last hellhound will always drop a Max Ammo, it is a good strategy to use the Thundergun on the Hellhounds until they are either all dead or the Thundergun is on its last drum, in which case the user should switch to their secondary if there are any hounds left.
The Thundergun was originally thought by Richtofen to have been created by Dr. Maxis and that Maxis had been deliberately hiding it from him as he grew to not to trust Richtofen though this could mean that Richtofen didn't trust Maxis and maybe became paranoid. Richtofen even referred to it as the DG-3 (meaning he considered it to be the Wunderwaffe DG-2's successor). One of the radios in Ascension reveals the true creation of the Thundergun. It was a Russian weapon codenamed "Project Thunder" and was being worked on by the Ascension Group under Gersch's direction. Gersch knew about its range problem and was trying to fix it. He also knew about its small ammo (power cell) count.
Finding the Thundergun in the CampaignEdit
The Thundergun can be used in the singleplayer level "Numbers" as an easter egg, similar to the Ray Gun in "Little Resistance."
The gun found in "Numbers" comes with two shots in the magazine and 12 shots in reserve. However, unlike in Zombies, it is possible to reload without the entire clip being empty. It also gains a full ammunition refill after sliding down the pipe and at the second weapons cache. Because of this, it becomes very useful when playing on Veteran. In essence, it works much like an extremely powerful shotgun, throwing and almost always instantly killing anyone caught in its massive spread, often with enough force to tear off limbs.
The player can swap out for another weapon, and the player will be able to pick it up. Sometimes after picking up another weapon, the Thundergun becomes unusable because of a bug. Also, if the player jumps up onto the table with the cassette player and look behind it the player will see an arrow like some that the player would see in Nazi Zombies. This Easter Egg is even available on the Wii.
The steps and video on how to do it are shown below:
- After the interrogation scene ends there are six big white canisters in front of the player on the walls. (Note: they are not the small propane tanks on the ground; they are the big white ones).
- Shoot, or throw grenades at all six canisters until Nova-6 comes out (note: the player must cause damage to the canisters before the enemies do, so the player might want to flashbang the enemies to prevent them shooting the canisters).
- Run past the ladder to a small room connected to where the player first starts the mission.
- If done correctly the player will see a black tape sticking out of a cassette player next to the door way.
- Hold down the action key and the tape will disappear from the cassette player, or the obvious shake in the screen as cue.
- Continue on until the player gets to the first of Clarke's weapon caches, behind the fridge after the rooftop jump.
- Look to the left and the player should find a cassette player.
- When at the cassette player, press the use button and notice the cassette go in.
- If done correctly, notice the tape goes in and the player hears several tunes, and the screen shakes.
- The Thundergun will appear on the wall above the cassette player.
The Thundergun can be obtained through the Mystery Box for 950 points in the maps Kino der Toten and Ascension, and the revamped Call of Duty: World at War map Nacht der Untoten. It shoots a compressed air shock-wave blast that knocks any zombies backwards that survive the original hit.
When Pack-A-Punched, it becomes the "Zeus Cannon". The Zeus Cannon's magazine capacity is increased to 4, and its reserve capacity is increased to 24. It has increased range and radius, and can now knock over zombies off-screen. The Thundergun is one of the most useful weapons in Zombies Mode, especially when another player is downed. It can clear huge amounts of the undead with minimum effort, which can help the player reach the downed player extremely easily. It can kill multiple zombies without hassle and can save the player's life, but the downside is its short range. Despite being unusable, the Thundergun makes an appearance in "Five" in the weapons-testing lab, suggesting that the Thundergun was found by the USA and was being reverse engineered by the Pentagon. It is debatable whether or not the Thundergun is better than the Wunderwaffe DG-2. The Thundergun will kill all the zombies within its range and, unlike the Wunderwaffe, it does not hurt the player when fired close-range. However, the Wunderwaffe can kill zombies which would normally be out of the Thundergun's blast range, and has the ability to kill zombies around corners. The Thundergun also has less ammo overall, and cannot be reloaded without unloading the magazine, unlike the Wunderwaffe. It is, for all intents and purposes, impossible to miss with the Thundergun if the Zombies are within its range, whereas missing with the Wunderwaffe is certainly possible.