Source-checkedCreatures & NPCs

GZ-Threat: Biter Escalation [BYOB]

by gz-mods · for Factorio

100% data-stage driven enemy behavior and new tech. Unlock Biter Mutagenesis, then research biter/spitter biomass, speed, damage, swarm quantity, and Apex Strain Evolution rank pressure. 5+1 new techs and an ultimate endgame foe that never quite stays dead.

500Downloads
15d agoLast updated
Factorio Mod PortalSource

About GZ-Threat: Biter Escalation [BYOB]

From Factorio Mod Portal

100% data-stage driven enemy behavior and new tech. Unlock Biter Mutagenesis, then research biter/spitter biomass, speed, damage, swarm quantity, and Apex Strain Evolution rank pressure. 5+1 new techs and an ultimate endgame foe that never quite stays dead.

BUILD YOUR OWN BURIAL

GZ-Threat: Biter Escalation (Early BYOB Edition)


5+1 NEW TECHNOLOGIES!

INSANE NEW THREAT VECTOR!

UNLIMITED WAYS TO LOSE!


  • This mod is holding on by the seat of its pants and was only tested to not crash the game and that the systems were functional
  • This mod is in desperate need of balancing but is entirely playable and beatable
  • This mod will get a lot of integration with gz-loot and gz-economy as well as mods like Alien Loot
  • I spent more time on this than I wanted to and will take some time to work on other mods before the integrations

  • Biters = Both biters and spitters. Have not touched Gleba units yet.
  • Biters no longer only target only sources of pollution. If the player is a closer target, they will target the player instead.
  • Biters scale from level 1 to 100. For every 10 levels, each biter moves up one rank.
  • The highest level biter in an attack group will be promoted to the next rank.
  • 50% of the remaining biters will be demoted 1 rank.
  • If 20 rank 5 biters are in an attack group, one with the highest evolution class among them will be promoted to Broodleader
  • Of the 19 remaining, 50% will be demoted to the next lowest rank based on evolution class
  • 1 level 6 Broodleader biter, 9 rank 5 biters, 10 rank 4 biters in the attack group
  • Biters do not use any additional pathfinding or runtime logic in order to execute.
  • Biters simply mimic the leader's target or else target the player when they are close by.
  • GZ Leveled biters are drawn in the data stage and stats are applied multiplicative with quality
  • Some extra hardcore "QOL" is included as an optional dependency (don't get wrecked)
  • I have included more details in the FAQ in case anyone did not want to be spoiled.

FAQ

--- SPOILERS AHEAD ---


LEVELING

  • Killing the first biter triggers the Biter Mutagenesis tech, unlocking the ability for biters to be upgraded in the following ways by researching the corresponding tech:
  • Biomass Scaling: Size (up to 2.5x) and health
  • Swarm Architecture: Attack group size increased
  • Endocrine Overdrive: Movement and attack speed increased
  • Xeno-gene Splicing: Attack damage increased
  • Apex Strain Evolution: Each level increases the global rank by 1 level
  • Each time the player researches a technology, they will additionally receive one level in Apex Strain Evolution
  • At level 150, a single Pandora Omega enemy spawns on the map
  • This is roughly around the time most players are getting ready for Aquilo
  • Pandora Omega moves slowly but will travel any distance to reach the player's science labs.
  • Pandora Omega destroys infrastructure on contact and is roughly equivalent in health and health regen to a Medium Demolisher
  • Pandora will initially spawn a maximum of once every 12 hours of playtime
  • Pandora ignores water tiles and moves through it with a splishy splash
  • Enemies will no longer increase in rank after level 100, but the time between Pandora spawns will decrease to around 4 hours

Highlights

From source data

Footprint

Rated a light load on a server.

Last update

Its author last shipped an update 15d ago.

GZ-Threat: Biter Escalation [BYOB] on Nxeon

From our catalogue
One-click install
Supported on Nxeon Factorio servers. We download it from Factorio Mod Portal, place it, and restart the server.
Server side
Required on the server
Server load
light
Smallest plan we suggest
Factorio — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
0.1.54, released 2026-10-20

Recent builds

BuildReleasedGame versionsLoaders
0.1.542026-10-202.0n/a
0.1.532026-10-072.0n/a
0.1.512026-09-262.0n/a
0.1.502026-09-262.0n/a
0.1.492026-09-192.0n/a
0.1.482026-09-172.0n/a

Dependencies

Declared by the newest build that lists any. Required ones are installed with it on one-click installs.

Run GZ-Threat: Biter Escalation [BYOB] on a Factorio server

Pick a server or deploy a new one above; it is installed in one click.

What kind of mod it is

From the catalog
Listed on Factorio Mod Portal as “Mods”

Creatures & NPCs

Adds or changes creatures, NPCs and how they behave.

Runs on your server

From source side support

Factorio Mod Portal lists GZ-Threat: Biter Escalation [BYOB] as required on the server. Check its Factorio Mod Portal page to see whether players need it too.

Compatibility

Game
Factorio
Runs on
Serverrequired on the server

Verified at the source

  • ✓Factorio Mod PortalOfficial listing, checked 2026-10-20Open ↗
  • ✓Authorgz-mods, as published on Factorio Mod Portal
  • ✓LicenseNot published by the sourceFree

GZ-Threat: Biter Escalation [BYOB], answered

Generated from the mod’s own source data.

Do my players need to install GZ-Threat: Biter Escalation [BYOB]?

Factorio Mod Portal lists GZ-Threat: Biter Escalation [BYOB] as required on the server. Check its Factorio Mod Portal page to see whether players need it too.

Is it free?

Yes. GZ-Threat: Biter Escalation [BYOB] is free to download from Factorio Mod Portal.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

NxLabs

Run GZ-Threat: Biter Escalation [BYOB] on a Factorio server.

Deploy in about a minute from $2.99 a month, then add GZ-Threat: Biter Escalation [BYOB] in one click.