M-25 Rumbler

The Rumbler portable mortar is a heavy piece of equipment and very clunky in its operation. Its clunkiness is tolerated however, mostly because of its immense firepower, but also because it is a variable distance indirect fire weapon. The Rumbler is part of the Weapons equipment kit.

The Rumbler launches bursts of three 80mm grenades at a time, saturating a small area with firepower. As an indirect weapon with variable range, it's highly useful for softening up enemies before they reach your teammates, with less risk of hitting them in crossfire. By default, it can fire two bursts before requiring a reload; the Mk2 has double the capacity, allowing for four bursts between reloads. Reloading the Rumbler takes 4.5 seconds and immobilizes the operator for its duration.

The final upgrade adds a very powerful toxic agent to the mortar grenades, which can kill a nearby Helldiver three times over (similar to the TOX-13 Avenger's effect on human tissue). They can still be saved, however, by quickly moving over to them and helping them off the ground three times in quick succession as the poison wears itself out.

Aiming the Rumbler takes training and patience. It works by holding the trigger to increase elevation, then releasing the trigger to fire. It is not recommended to rotate during aiming unless the proper amount of weapons training has been put in, as this will cause the mortar grenades to be fired in a highly-dangerous fan-shaped pattern -- potentially wiping out an entire squad of Helldivers in one salvo. Once this skill has been mastered, though, it can be used to great effect.

The Rumbler is capable of destroying mission objectives that would ordinarily require the use of a NUX-223 Hellbomb, such as Bug Nests, Illuminate Beacons and Cyborg AA.

Unlock Requirement
The M-25 Rumbler is a DLC weapon, available at any rank to those who purchase the Weapons equipment kit.

Stratagem Code
Players must enter the following sequence, using the controller d&#8209;pad, in order to call down the M-25 Rumbler during a mission: