Horde Siege
Every mission modifier
A modifier changes the rules of a Horde Siege mission. The game data has 101 mission modifiers under 93 names, plus 7 match-event modifiers that apply during a match. All of them are listed here, grouped by what they change. What missions pay is on Siege rewards.

How to read this
- Effect is what the name and the target list say. Nothing is described from the title alone.
- Numbers appear only where the data states them clearly. The enemy damage steps are +20%, and the pistol, precision and sniper bonuses are the figures in the final data. Other amounts are not consistent enough to print, so they are left out.
- Same name, several entries. Some names cover more than one entry, such as Limited Supply. The effect cell says when that happens. Labels that read like shorthand are the data’s own wording.
No modifier matches.
Enemy health
13 names
Two families. The "Increased Health" ones are built as damage resistance, the "Beefy" and "Health Up" ones as extra maximum health. The data gives the name and the target, and does not give an amount you can rely on.
| Modifier | Effect |
|---|---|
| Bosses Increased Health | Anything flagged as a boss gets more health. Built as a damage-resistance effect. |
| Large Locusts Increased Health | Flooders, Grinders, Boomers, Scorched Boomers and Reavers get more health. Built as a damage-resistance effect. |
| Grinders Increased Health | Grinders get more health. Built as a damage-resistance effect. |
| Reavers Increased Health | Reavers get more health. Built as a damage-resistance effect. |
| Grenadiers Increased Health | Grenadiers get more health. Built as a damage-resistance effect. |
| Spore Matrons Increased Health | Spore Matrons get more health. Built as a damage-resistance effect. |
| Tickers Increased Health | Tickers get more health. Built as a damage-resistance effect. |
| Wretches Increased Health | Wretches, including the feral type, get more health. Built as a damage-resistance effect. |
| Locust Health Up | Locust enemies get more health. Built as a max-health increase. |
| Beefy Large Locust | Flooders, Grinders and Boomers get more health. Built as a max-health increase. |
| Beefy Boomers | Boomers get more health. Built as a max-health increase. |
| Beefy Grenadiers | Grenadiers get more health. Built as a max-health increase. |
| Grinders Health Up | Grinders get more health. Built as a max-health increase. |
Enemy damage
12 names
Twelve names raise what the Locust deal. Nine are stored as the same +20% step, and the on-screen buff text for the blanket version reads "+20% Enemy Damage". The three exceptions are marked.
| Modifier | Effect |
|---|---|
| Locust Damage Up | All Locust enemies deal more damage. Damage dealt +20%. |
| Bosses Damage Increase | Bosses deal more damage. Damage dealt +20%. |
| Boomers Damage Increase | Boomers deal more damage. Damage dealt +20%. |
| Grinders Damage Increase | Grinders deal more damage. Damage dealt +20%. |
| Large Locusts Damage Increase | Flooders, Grinders and Boomers deal more damage. Damage dealt +20%. |
| Reavers Damage Increase | Reavers deal more damage. Damage dealt +20%. |
| Wretches Damage Increase | Wretches deal more damage. Damage dealt +20%. |
| Enemy Snipers Damage Increase | Enemy Snipers deal more damage. Damage dealt +20%. |
| Flooders Damage Increase | Flooders deal more damage. Damage dealt +20%. |
| Locust with guns damage increase | Armed Locust (Boomers, Grinders, Drones and similar) deal more damage with their guns. The amount is not settled in the data: one place stores 15%, the buff text says 20%. |
| Big Muscles | Enemy melee hits harder. The on-screen buff text reads "+20% Enemy Melee Damage", but one stored value reads 30%, so no amount is printed here. |
| Vraahk Increased Damage and Damage Resistance | Vraahk deals more damage and takes less. No amount given. |
Enemy regeneration and behavior
7 names
Not stat bumps. These change how the Locust recover and what they throw.
| Modifier | Effect |
|---|---|
| Enemy Health Regeneration | Enemies regenerate health. On-screen buff text: "Enemies Regen Health". |
| Large Locusts Health Regeneration | The Boomer family regenerates health. |
| Drones Health Regeneration | Rifle Drones regenerate health. |
| Enemy Snipers Health Regeneration | Enemy Snipers regenerate health. |
| Enemy get back from DBNO quicker | Downed enemies get back up quicker. DBNO means “down but not out”. |
| Enemy Gear Frequency Increase | Enemies use their gear more often. On-screen buff text: "Enemy Gear Usage Increase". |
| Grenadiers Grenade Usage Increase | Grenadiers throw grenades more often. |
Enemies that go out with a bang
15 names
A property added to an enemy type that triggers when it dies. Exploding and Fiery are the same idea with and without fire, Concussive drops a concussion grenade, and Caustic leaves a puddle.
| Modifier | Effect |
|---|---|
| Locust Explode on Death | Locust explode when they die. |
| Exploding Drones | Rifle Drones explode when they die. Two entries share this name; one is built from the incendiary version. |
| Exploding Grenadiers | Grenadiers explode when they die. |
| Exploding Wretches | Wretches explode when they die. |
| Locust Drop Incendiary on Death | Locust drop an incendiary when they die. |
| Fiery Grenadiers | Grenadiers explode with an incendiary effect when they die. |
| Fiery Wretches | Wretches explode with an incendiary effect when they die. |
| Concussive Drones | Rifle Drones drop a concussion grenade when they die. |
| Concussive Grenadiers | Grenadiers drop a concussion grenade when they die. Two entries share this name. |
| Puddle On Death | Enemies leave a puddle when they die. On-screen buff text: "Enemies Drop Puddles On Death". |
| Caustic Drones | Rifle Drones leave a caustic puddle when they die. Two entries share this name. |
| Caustic Grenadiers | Grenadiers leave a caustic puddle when they die. |
| Caustic Tickers | Tickers leave a caustic puddle when they die. |
| Caustic Wretches | Wretches leave a caustic puddle when they die. |
| Caustic Flayers | Flayers leave a caustic puddle when they die. The data attaches this to the Scorched Boomer type. |
Enemies that burn you
7 names
Incendiary damage added to an enemy type. On-screen buff text for the generic version: "Incendiary Damage".
| Modifier | Effect |
|---|---|
| Incendiary Damage | Enemy attacks deal incendiary damage. |
| Incendiary Drones | Rifle Drones deal incendiary damage. |
| Incendiary Grinders | Grinders deal incendiary damage. |
| Incendiary Enemy Snipers | Enemy Snipers deal incendiary damage. |
| Incendiary Wretches | Wretches deal incendiary damage. |
| Incendiary Melee | Melee attacks deal incendiary damage. |
| Vraahk Incendiary Damage | Vraahk deals incendiary damage. |
Jammers
4 names
All four share an underlying name that reads Nemacyst Disruption. The data names them and targets them. It does not say what the jam does.
| Modifier | Effect |
|---|---|
| Jammer Large Locusts | Puts a jamming effect on Vulcan Grinders, Scorched Boomers, Grinders and Boomers. |
| Jammer Large Creatures | Puts a jamming effect on Boomers, Reavers, Flooders and Spore Matrons. |
| Disrupt Tac Com | A jamming modifier with the blanket name. What it jams is not described. |
| Passive Jammer | Gives Wretches a passive jamming effect. |
Aimed at you
16 names
These leave the Locust alone and take something away from the way you play.
| Modifier | Effect |
|---|---|
| Only Perfect Reloads | The ordinary active reload window goes. Only a perfect reload counts. |
| Harder Reload | The perfect-reload window gets harder to hit. |
| Regeneration Only In Cover | You heal only while in cover. |
| Regen Only On Kill | You heal only by getting kills. On-screen buff text: "Death is Life". |
| Delayed Health Regeneration | Health regeneration starts later. |
| Longer Tactical Gear Cooldown | Your class gadget takes longer to come back. |
| Caustic Resistance Decrease | You take more damage from caustic. |
| Caustic Damage Duration Increase | Caustic damage lasts longer on you. |
| Squad Friendly Fire | Squad friendly fire is switched on. |
| Player Health Decrease | Player maximum health goes down. |
| Player Melee Damage Decrease | Your melee damage goes down. |
| Player Struggle Decrease | Changes the struggle special move. The name says decrease and nothing more. |
| Slow Revive | Revives take longer. |
| Exploding COG | Your own side explodes when they die. |
| Precision Damage Down | Precision weapons deal less damage. |
| Explosive Damage Down | Explosive damage goes down. |
Damage trade-offs
13 names
One class of damage goes up and the rest goes down. The data stores the "down" side too, but not stably enough to print, so only the "up" figures that read cleanly are shown.
| Modifier | Effect |
|---|---|
| Heavy Weapons Damage Up, Other Weapons Down | Heavy weapons deal more damage. Other weapons deal less. |
| Pistols Damage Up, Other Weapons Damage Down | Pistol damage bonus x1.25. Other weapons deal less. |
| Precision Weapons Damage Up, Other Weapons Damage Down | Precision bonus x1.2. Other weapons deal less. |
| Shotgun Weapons Damage up, Other Weapons Damage Down | Shotguns deal more damage. Other weapons deal less. |
| Sniper Weapons Damage Up, Other Weapons Damage Down | Sniper bonus x1.2. Other weapons deal less. |
| Explosive Damage Up, Others Down | Explosive damage goes up. Everything else goes down. |
| Critical Damage Up, Others Down | Weak-spot damage goes up. Regular damage goes down. |
| Equipment Damage Up, Weapon Damage Down | Equipment deals more damage. Weapons deal less. |
| Locust Weapon Damage Up, COG Weapon Damage Down | Locust weapons deal more damage. COG weapons deal less. |
| Drones Weakspot Up, Others Down | Drone weak spots take more damage. Other hits count for less. |
| Large Locusts Weakspot Up, Others Down | Boomer-family enemies, Flooders and Spore Matrons take more weak-spot damage. Other hits count for less. |
| Reavers Weakspot Damage Up, Others Down | Reaver weak spots take more damage. Other hits count for less. |
| Enemy Damage Increase, Health Decrease | Trades enemy damage against health, as the name says. Two entries share this name, a standard and a "High" version. |
Supplies and Energy
6 names
The ones that change what a mission is worth.
| Modifier | Effect |
|---|---|
| Raised Supply Cache Prices | Supply Cache items cost more. |
| Limited Supply | Restricts what a Supply Cache offers. Five entries share this name: a general version, Explosives only, Revive Device only, Shotgun only, and a Barriers version. |
| Limited Access | Named in the data. No description. |
| Supply Caches Disabled | Supply Caches are switched off. |
| Decreased Energy | You collect less Energy. |
| High Starting Energy, Low Pickup Rate | You start with more Energy and collect less of it afterward. |
Match-event modifiers
7 names
These are not part of a mission’s own list. They are applied to a match as an event. Decreased Energy and Supply Caches Disabled also exist as mission modifiers above, under the same names.
| Modifier | Effect |
|---|---|
| Corpser Immune | The Corpser is immune to damage, as the name says. |
| Decreased Energy | You collect less Energy. |
| Decreased Ammo Supplies | Ammo pickups give less. |
| Jammer Effect | A jamming effect on the Corpser, the Brumak and Broodshifters. What it jams is not described. |
| No Perfect Reloads | Perfect reloads are switched off. |
| Extraction Disabled | The extraction is switched off for the match. |
| Supply Caches Disabled | Supply Caches are switched off. |