About GZ-Threat: Biter Escalation [BYOB]
From Factorio Mod Portal100% 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 dataFootprint
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
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 0.1.54 | 2026-10-20 | 2.0 | n/a |
| 0.1.53 | 2026-10-07 | 2.0 | n/a |
| 0.1.51 | 2026-09-26 | 2.0 | n/a |
| 0.1.50 | 2026-09-26 | 2.0 | n/a |
| 0.1.49 | 2026-09-19 | 2.0 | n/a |
| 0.1.48 | 2026-09-17 | 2.0 | n/a |
Dependencies
- Required: GIZMOD: IYKYK Edition [Modding Toolkit]
- Required: GZ-Loot: Enemy Loot, Random Drops, and Auction House
- Optional: GZ-Hardmode [Build Your Own Burial]
- Optional: GZ-Saurus Wrecks: Auxiliary Support
- Optional: GZ-Diplomacy [Teams/Forces + Separate Start and Research]
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 catalogCreatures & NPCs
Adds or changes creatures, NPCs and how they behave.
Runs on your server
From source side supportFactorio 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

