Check out this Heavy Cannon guide for DOOM Eternal! Contains info on all Heavy Cannon Mods, Upgrades, Mastery, & challenges, as well as tips on how to use it effectively!
Table of Contents
Heavy Cannon - Weapon Stats & Tips
Heavy Cannon - Basic Stats

Ammo Type | Bullets |
---|---|
Effective Range | Mid to Long Range |
Strong Against | Fodder Enemies, Weak Points |
Effective Mid to Long Range Weapon

The Heavy Cannon is a great weapon to use when engaging enemies from mid to long range. It features a fully automatic firing mode, allowing you to spray and focus on enemies without having to get too close to them.
Consumes Bullets
The Heavy Cannon uses bullets as ammunition. It shares the same ammo type with the Chaingun, so managing how much bullets you have is necessary as the Chaingun can eat up your supply quickly!
Efficiently Kill Fodder Enemies

The Heavy Cannon is an excellent weapon to use when facing fodder enemies such as Zombies and Imps. A single shot to the head or 2 body shots will more often than not be enough to kill them. A highly efficient weapon when not facing notable enemies!
Useful For Destroying Weak Spots

The Heavy Cannon is also one of, if not the best weapon to pick off enemy weak spots! You can use this to destroy heavy enemy weak spots at range before closing in for the kill!
Not Recommended to Finish Heavies
Despite it being a great way to start fights against heavy enemies, it would be best to switch out to another weapon when trying to finish them off to further conserve your bullets!
Unlocked at Mission 1

You will be able to get and use the Heavy Cannon in the game's very first mission: Hell on Earth.
Check Out the Mission 1 Walkthrough Here!Precision Bolt - Heavy Cannon Mod
Turn Your Cannon Into a Sniper Rifle

The Precision Bolt will allow you to aim down the scope of the weapon, and target enemies at a much longer range. It will also slow down the fire rate of the weapon, and increase ammo consumption to 6 rounds per shot, but will deal much more damage. Effective against weak spots.
Available Upgrades Precision Bolt Mod
It is recommended that you invest your Weapon Points into the Fast Loader upgrade first as this will allow you to pick off multiple weak spots much faster!
Upgrade Point | Description |
---|---|
Mobility 3 | Precision Bolt movement speed is increased by 15% |
Fast Loader 6 | Precision Bolt reload speed increased by 20% |
Headshot Blast - Precision Bolt Mastery
A headshot will set off a powerful, secondary blast that deals damage to nearby demons.
NOTE: All upgrades need to be unlocked to access the Mastery Challenge and unlock the Mastery.
Mastery Challenge
Get 75 Precision Bolt headshot kills.
Bypass Challenge With Mastery Tokens
By spending a Mastery Token, you can immediately bypass the Mastery Challenge.
Micro Missiles - Heavy Cannon Mod
Unload Homing Rockets Onto Enemies

Having this mod equipped will cause you to fire a salvo of small missiles that will slightly home in on targets. It's a great mod to have when you want to rain down decent AoE damage over a large area. Keep in mind that these missiles do not destroy weak spots.
Available Upgrades Micro Missiles Mod
It is recommended to focus on getting the Primary Charger upgrade first as this will temporarily boost your missile damage, allowing you to become more of a threat when using the mod!
Upgrade Point | Description |
---|---|
Quick Recharger 1 | Micro Missile reload time is decreased by 35% |
Instant Loader 3 | Micro Missile load time is decreased by 75% |
Primary Charger 5 | Kills with the Heavy Cannon will boost Micro Missiles damage by 30% for 5 seconds |
Bottomless Missiles - Micro Missiles Mastery
Fire Micro Missiles infinitely without having to reload.
NOTE: All upgrades need to be unlocked to access the Master Challenge and unlock the Mastery.
Mastery Challenge
Hit three enemies with a single salvo of missiles, 15 times.
Bypass Challenge With Mastery Tokens
By spending a Mastery Token, you can immediately bypass the Mastery Challenge.
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