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Empires of the Undergrowth News

Optional Beta Invite - Large optimisations, Fixes

An optional beta is currently available for all Mac & Windows Steam users of Empires of the Undergrowth. This one sees some significant optimisations designed to aid texture streaming and other processes, fixes issues with Bomb Mode and the exploding ant update.

We are very appreciative of any feedback! Just post on the Steam forums or join our Discord to join in the chat there. Friendly, ant-loving gamers guaranteed!

Code: fixtheundergrowth


If you would like to join the beta, the code is fixtheundergrowth. If you don’t know how to join a beta and would like to, follow the instructions below:
  1. Find Empires of the Undergrowth in your Steam library, right-click on it and choose "Properties"
  2. Choose the "Betas" tab
  3. In the box titled "Enter beta access code to unlock private betas", enter fixtheundergrowth
  4. After the "Access code correct" information appears, make sure you've chosen "Open beta" from the "Select the beta you would like to opt into" drop-down menu
  5. Press close - the game will now update to the beta branch.

[h2]Changes & Fixes[/h2]
  • Significant optimisations made to VRAM usage across the game, with the intent of decreasing load time and artifacting
  • Significant optimisations to textures
  • Fixed exploding ant ability Persistent Secretions - damage is now 50% of base explosion damage over 4 seconds as intended
  • DPS values for new colony creatures now show when selecting them to build. Please note that these values do not account for the explosion as the DPS on that would skew the results in a way that is not representative of the actual creature’s regular attack
  • Myrmecia ereptor now shows in the end-game victory cinematic animation if it is selected as the colony appearance
  • Swapped position of rufa and atta in custom colony setup
  • Queen danger termite voice line now plays for both termite types
  • Removed falloff from exploding ant damage so it now does the same damage at the edge of the explosion as it does in the centre
  • Exploding ants and termites are no longer revivable by Matabele medics if they have exploded
  • Fixed hat position for the two ereptor queens
  • Myrmecia ereptor now appears in the level selection screen
  • Army ant’s food items have been better hidden in Front Line and No Ant’s Land
  • Bombs should now spawn from all non-colony creatures in all levels if Bomb Mode is active
  • Fixed an issue that would relocate singular ants without neighbours to the nest group on loading
  • Fixed an issue with food types dropped from a killed colony not changing to something useful for the killer in custom games
  • Disabled Bomb Mode in the tutorial and Beetles Rise Up!
  • Exploding termite AI colonies will now start with some food storage
  • Disabled leafcutters in Remix versions of new extra levels for the time being

VLOG 14 - Next Up!

At least one of us decided to touch grass - an update on how things are going and where we think we're going next!

[previewyoutube][/previewyoutube]

Since this is also a general Slug Disco update as well as an Empires of the Undergrowth one, there is a section at the beginning that doesn't deal with EotU - if you'd prefer to skip that, the timecode is 01:36.

Fixes - V1.101073

This small patch deals with some issues from the 1.1 update that arrived yesterday. There are more fixes on the way soon but these deal with the most pressing ones, so we're getting these out first.

[h2]Fixes - General[/h2]

  • Fixed an issue with charge abilities (ie, driver ants and big-headed ants) not working in Battle Arena
  • Fixed ants with garbled textures on Beetles Rise Up! extra level and Hungry Spider seasonal level
  • Fixed glow position on the leafcutter supermajor (Adventure extra level)
  • Altered several assets to optimise texture streaming

[h2]Fixes - Exploding Ants DLC[/h2]

  • Fixed a hang / crash that occurred when expIoding termite colonies were added to custom games
  • Rapid Maturity & Accelerated Gland Filling now correctly update exploding termite worker visuals when they become explosive & fully powered
  • Fixed termite mound not appearing on No Ant's Land extra level
  • Fixed exploding ant worker and queen descriptions
  • No Ant's Land extra level now uses termite voice lines
  • Exploding termite workers now have access to the lignocellulose digestion toggle if in a Macrotermes colony
  • Mulch on No Ant's Land extra level can now be harvested up to 45 at a time (depending on the harvester)
  • Fixed an issue where new creatures were not changing the mouse cursor to the build tool
  • Changed exploding termite soldier to melee class to match other UI elements



Empires of the Undergrowth 1.1 - Art Remaster, Exploding Ants DLC - OUT NOW

Empires of the Undergrowth 1.1 is out now! A major remastering of many art assets including the rainforest environment, leafcutter ants, black ants, and gene thief ants is included for all owners of the game. Many changes and fixes are also included - full details are included in the patch notes below.

[previewyoutube][/previewyoutube]

Releasing simultaneously is the Exploding Ants DLC, which adds the exploding ants (Colobopsis explodens) and exploding termites (Neocapritermes taracua) to the mix. These are based on real-life species that really do rupture their bodies in an act of self-sacrifice for their colony! Nature is endlessly inventive.

Finally, the Supporter Pack is also releasing today and is now available separately.

[h3]Leave a Review, Fuel the Swarm[/h3][hr][/hr]If you've been enjoying 1.1 — or even if you've just got thoughts on exploding termites—we’d love to hear your feedback in a Steam review. They’re not just a boost to visibility; they help us understand what’s working and what needs more love. Thanks for being part of the colony!

Empires of the Undergrowth 1.1


[h2]Rainforest Art Remaster[/h2]
The following rainforest levels have been remastered:
  • 3.1 The Harvest
  • 3.2 Front Line
  • Custom game map Basin
  • Custom game map Embankment

[h2]Creature Art Remaster[/h2]
The following ant species have been remastered:
  • Leafcutter ants - queen, majors, mediae, minors, minims
  • Gene thief ants - queen, workers
  • Black ants - workers, soldiers

[h2]Improved Creature Animations[/h2]
The following rainforest creatures have had improved animations:
  • Leaf mimic praying mantis
  • Jumping spider
  • Trapjaw ant

[h2]Fixes & Changes[/h2]
  • Pillage the Pillagers achievement can now be attained
  • Fixed Matabele medics getting stuck if their heal target is removed from play
  • Queens can no longer be picked up by larger creatures
  • Fixed a termite mound issue in Drive Them Back (Custom Game Version)
  • Fixed a texture chamber issue on old beach tile set
  • A voice line referencing ants will no longer play if the player is a termite colony
  • Prevented lignocellulose spawning in termite mound walls in custom games
  • AI colonies in custom games will no longer harass colonies that are dead / missing their queen
  • Seasonal hats will now appear in the right place on Matabele & termite queens
  • Added a failsafe to a possible crash involving phorid flies
  • Fixed player’s army ants counting towards objectives in Adventure in remix mode
  • Some lighting corrections in Drive Them Back (Custom Game Version)
  • Fixed All The Heals achievement failing on hard difficulty due to starting soldier tiles
  • Fixed a crash relating to the American bullfrog
  • Fixed mulch landmarks always being on the map with pre-set landmarks even when no Matabele or termites are in play
  • Fix for Full House achievement issues
  • Some grammar / spelling fixes here and there
The Exploding Ants DLC - Headline Features


The Exploding Ants DLC is now available from the Steam store. It includes not just exploding ants, but exploding termites as well! Both perform a remarkable function called Autothysis which can be toggled on and off like climbing and aphid collection. Once you have the DLC installed, the following features will be available to you:

[h2]Exploding Ants - Colobopsis explodens[/h2]

Exploding ant soldiers are available as unlockable units in ereptor colonies. When threatened, they explode causing high damage and a concussive blast. As part of an ereptor colony, the exploding ant soldiers have the following upgrades available:
  • A choice of Controlled Blast or Violent Blast, increasing the damage or radius of the explosion, respectively
  • A choice of Chain Reaction or Persistent Secretions, increasing the damage of other exploding ants caught in the blast or leaving a pool of liquid that causes continual damage, respectively

Explodings ants are available as full colonies in custom games, remix mode and the extra level The Harvest - Firebreak:
  • Colobopsis explodens majors do not explode, but take less damage from the front and have an underground-only ability. They will go stationary, and buff the armour of allied units around them

In The Harvest - Firebreak, exploding ants must eliminate an aggressive fire ant colony against the backdrop of two leafcutter ants bringing in their harvest. Find it in the Extra Levels section of the Arcade.

[h2]Exploding Termites - Neocapritermes taracua[/h2]

Exploding termite workers are available as unlockable units in ereptor colonies. When threatened, they explode causing damage over time and confusion to enemies.
  • Since they are workers, they will perform nest jobs as usual
  • Workers are born inert but become explosive after a time, indicated by a change to their UI icon
  • The older the worker is before it explodes, the more damage over time and the longer the confusion effect will be

As part of an ereptor colony, the exploding ant workers have the following upgrades available:
  • A choice of Rapid Maturity or Accelerated Gland Filling, which reduces the time until they become explosive or speeds up the damage over time and confusion increase, respectively
  • A choice of Extreme Toxins or Extreme Confusion, which increases the length of the damage over time or the confusion effect, respectively

Exploding termites are available as full colonies in custom games, remix mode and the extra level Front Line - No Ant’s Land:
  • Neocapritermes taracua majors do not explode, but they have a dual ability called Asymmetric Snapping. Underground, this ability causes high damage to enemies. Above ground, it will sun an enemy and cause the termite itself to be flung back
  • Exploding termites consume lignocellulose in a similar way to African termites, but they do not require the steps to process it into fungus and instead consume it directly

In Front Line - No Ant’s Land, a small colony of exploding termites must survive a number of days against the approaching lines of army ants. Find it in the Extra Levels section of the Arcade.

DLC - Supporter Pack


The Supporter Pack does not add anything that affects gameplay, but is intended for those who have expressed that they missed out on the original funding campaign way back in 2016. It includes the following items:
  • Myrmecia ereptor gene thief skin - new models and animations for the gene thief ants. Includes both queen and worker models. Inspired by real-life bull ants (Myrmecia genus)
  • Original Soundtrack - the Empires of the Undergrowth soundtrack, 170 minutes presented in 35 separate tracks and downloadable as uncompressed WAV files
  • Sounds of the Undergrowth widget to listen to the music and voice-lines in-game, with adjustable sliders for intensity
  • 7 4k wallpapers with multiple variations for a total of 16 wallpapers
  • 19 emojis, with some based on the game’s achievement icons
  • 12 portraits


We hope you enjoy the update! This release completes a large swathe of our current roadmap, and puts a dent in the rest of it. So, go and marvel at the beauty of the jungle, and blow it up with exploding creatures!

Save 50% on Empires of the Undergrowth

Empires of the Undergrowth is now 50% off as part of the Hooded Horse Spring Publisher Sale.

Command an ant colony and wage strategic battles in the insect kingdom. This ant-based RTS challenges you to build, defend, and expand your colony, using unique pheromone-based strategies and powerful warrior ants to overcome formidable foes.

Hooded Horse Spring Publisher Sale 2025

https://store.steampowered.com/app/463530/Empires_of_the_Undergrowth/