In the chaotic galactic war of Helldivers 2, nothing says "managed democracy" quite like engulfing a swarm of Terminids in a localized wall of pure, unadulterated napalm. For players looking to control the battlefield through fire, the FLAM-40 Flamethrower is the ultimate support weapon stratagem. Available at the Ship Management Terminal for 6,000 Requisition Slips once you reach Level 10, this close-range powerhouse completely changes how your squad handles ground-based threats.
Instead of playing a guessing game with high-caliber bullets, the FLAM-40 allows you to paint the battlefield with area-of-effect damage, melt heavy armor, and completely shut down choke points. However, if you don't know how the math and mechanics work behind the fire, you are just as likely to burn yourself to a crisp as you are the bugs.
Let’s look at what makes this weapon tick, the hard numbers behind its damage output, and how to use it safely out in the field.
Weapon Overview The Core Numbers
Operating the FLAM-40 requires a quick fingers-on-the-pad input sequence: Down, Left, Up, Down, Up ($\blacktriangledown\blacktriangleleft\blacktriangle\blacktriangledown\blacktriangle$). Once called in—which takes a brief 3 seconds—the weapon is tied to a hefty 480-second cooldown. This means losing your weapon deep in an enemy nest can leave you vulnerable for a long time if you can't retrieve it.
When you pull the trigger, the numbers show just how terrifying this support choice can be:
The Damage Output: The base weapon pumps out a massive 450 damage per second (DPS). For players who invest heavy samples into their Super Destroyer, upgrading the Bridge department with the Enhanced Combustion module grants a flat 25% increase to stratagem fire damage. This kicks your operational output up to an incredible 562.5 DPS.
Range and Spread: The fire shoots out in a forward-spreading cone reaching up to 20 meters. However, due to the nature of the projectable fire particles, data miners have noted that the damage naturally scales based on proximity. The absolute sweet spot is between 5 and 10 meters, where the highest concentration of direct stream damage hits the target hitbox.
Logistics and Capacity: You drop in with 4 total fuel canisters (1 loaded and 3 reserves). Holding down the trigger continuously gives you exactly 12.5 seconds of fire per canister.
Crowd Control Effects: Beyond the raw damage numbers, the stream triggers secondary status effects. Direct contact with the flame stream automatically disorients enemies for 1 second and applies a 0.5-second movement slow, preventing smaller enemies from sprinting through the fire to bite you.
Tactical Strategies: How to Actually Cook the Enemy
To maximize your ammunition and efficiency, you shouldn't just spray the FLAM-40 wildly into the air.
First, practice the "Scorch the Earth" method. Instead of aiming directly at the chests of incoming bugs, tilt your camera slightly downward and spray the terrain right in front of them. This leaves lingering pools of fire on the ground. When enemies walk over these active flame patches, they receive a stacking Damage over Time (DoT) burn status. Letting the ground fire do the heavy lifting allows you to tap the trigger in controlled bursts rather than wasting a whole canister on a few small targets.
Second, understand that the FLAM-40 features Armor Penetration Level 4. This allows it to completely bypass standard medium armor and slowly cook heavily armored units from the inside out. Because the flame particles clip right through enemy hitboxes, you don't need to maneuver behind a target to hit a weak spot. If you maintain steady, concentrated fire on a single spot, you can bring down a massive Charger in roughly 7 seconds, a towering Impaler in 8 seconds, and an Automaton Hulk in a mere 4 seconds.
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Critical Survival Warnings
The biggest threat to a Helldiver carrying a FLAM-40 isn't a Bile Titan—it's themselves. The weapon creates physical fire assets on the ground that do not differentiate between alien flesh and your squad's armor.
Never Fire While Diving Backward: This is the number one cause of accidental self-immolation. If a Hunter jumps at you and you instinctively dive backward while holding down the trigger, your character’s legs sweep forward directly into the spray of your own gun. You will instantly ignite your own torso.
Stop Aggressive Advancing: It is incredibly easy to get caught up in the physical rush of burning down a swarm and accidentally walk forward into the exact ground fire you just created. Always let the enemy walk toward you. Hold your ground or slide laterally.
The Panic Button (Dive to Extinguish): If your screen flashes red and your character catches fire, you have less than two seconds to react before your health bar hits zero. Do not try to use a stim injection first—the animation takes too long. Instead, hit your dive button immediately. Dropping prone instantly cleanses the burning status effect, allowing you to safely stim once you are on the dirt.
Gear Up Appropriately: If you intend to make the flamethrower a permanent fixture of your loadout, look into armors that feature the Inflammable passive trait, such as the Salamander armor set. This specialized engineering trait slashes incoming fire damage by 75%, providing a massive safety cushion when things inevitably get messy in close quarters.
