Exterminatus - Rival Species 2

Welcome to the Exterminatus (EX) website.  EX is a team based, Warhammer 40,000 themed, total conversion for the Source game engine (as used in Half-Life 2). EX is being developed by the team that brought you Rival Species for Half-life.

The Extermintus has been open to the public to play for several years. Full releases are stable, tested, long term versions that you can get the latest full version from our Downloads page. Between full versions are Alpha releases, that are for demonstration and testing of the latest features and contributions to EX, you will usualy find downloads for the latest Alpha linked on this page.


Alpha 9.15 - Maps, Maps, Maps

Alpha 9.15 features five map updates, spacemarine voice acting and a number of feature tweaks.

Installer Alpha 9.15 ( 1.69gb )

Zip Alpha 9.15 ( 1.67gb )

The ModDB mirrors unlock at 16:00 GMT, if it's busy or not working the installer can be downloaded from 40ksource.com.  Please try the ModDB first.

Install the Source SDK Base 2013 Multiplayer
  • Navigate to the "Tools" section on your Steam games "Library"
  • Install the "Source SDK Base 2013 Multiplayer"
  • Run the Source SDK Base 2013 Multiplayer at least once.
  • You can exit once the menu has finished loading.

Install the latest Exterminatus Alpha
  • If you already have EX alpha, delete it.
  • Run the alpha installer and follow it's instructions.
  • Restart Steam.  You should now see the Exterminatus Alpha listed in your library.

  • Show the health of breakable objectives.
  • human crosshair radius reflects the effects of your stance.
  • First attempt at an announcer sub-system.
  • Enable ex_gameplay entity to specify a default timer to override the servers own multiplayer timeout.
  • Updated map ex_transmitter by WhiteLighting.
  • Updated map csm_transmitter by WhiteLighting.
  • Updated map ex_compromised by WhiteLighting, updates by ChromeAngel.
  • Updated map ex_bunker by WhiteLighting, updates by ChromeAngel.
  • Updated map csm_trench by ChromeAngel.

  • Dontask4470 has applied new filters to Bulwark's spacemarine voice acting.
  • New Boltgun first person animations by Kharos.
  • Consistent team colouring in the kill feed.
  • Default imperial mission to reflecting which enemy they are facing.
  • Put newly spawned players on the floor, rather then letting them drop.

I would like to thank Kharos, Bulwark, Dontask4470 and Whitelighting for their patience as they wait to see how their contributions are received by the other EX players.

by ChromeAngel - Today at 04:01:17 PM - Discuss

Exterminatus full version - Alpha 9 series roundup

After more than a decade in development we have finally decided to drop the "Beta" label from major releases. Today's "full" version is the first major release out of beta. This full version features a new scout class, scouting mechanic, faster boltguns, balance improvements and bug fixes.

Download the latest Exterminatus

The Scout
The major feature of Beta 9 is the Spacemarine Scout whose player model was contributed by Wikkyd and textured by ChromeAngel.  The scout is a first tier class, available form the start of each round and has only 90 health, in comparison to most marines 110. The scout makes up for it's low health by having higher speed than the tactical marine, being as fast as a veteran or assult marine.

The Scout has 3 wargear sets:
The Scout's Shotgun set is available for free.  The shotgun model was contributed by Clay_more and textured by ChromeAngel, it's sound effects were contributed by DontAsk4470.  The Shotgun holds 8 shells, which need to be individually loaded.  Each shot fires 10 pellets, which will do 46 damage if they all hit.  Secondary attack of the shotgun can be used to tag enemies for targeting by team mates at ranges up to 3012 units to earn more points.  The scout will announce the type of target, thanks to Bulkwark for voicing this addiontal scout dialogue and Dontask4470 for editing it.  The shotgun wargear set also includes a knife, frag grenades and a bolt pistol that work like their space marine counterparts.

The second scout wargear set is the boltgun set, which swaps out the shotgun for standard space marine boltgun for an extra 5 points.

The third set if scout wargeat is the Sniper Rifle set. The Sniper Rifle model was also contributed by Clay_more and textured by ChromeAngel with sound effects by DontAsk4470.  Secondary fire toggles the scope and slows the scout's movement.  Sniper rifle cost 25 points and do 50 points of damage per shot (as much as the far more expensive heavy bolter), however the sniper only gets 4 shots per magazine, so he has to choose his targets with more care.  Sniper rifles are slow to cycle taking 1.5 seconds per shot and 3 seconds to reload that magazine.  Stance greatly effects the accuracy of the sniper rifle, however it can be dead accurate by firing from a static crouched position.

The scouting system has been retrofitted to the secondary attack of the Genestealer's claws, so they can scout for the hive-mind, adding more depth and a use for the genestealer at range.

More Features
New prop models for live and fired Earthshaker shells.
New HUD icons for map votes and objective captures.

The following console variables were added for balance tuning the server: ex_csword_rof,
ex_caxe_rof, ex_caxe_dmg, ex_bolter_range, ex_bolter_actual_rof, ex_bolter_kick1,
ex_bolter_kick, ex_shotgun_dmg, ex_shotgun_pellets

A new map entity ex_shell_spot (as used on csm_trench) which detect nearby players then
call in a artillery fire on their position (with sound effects, vibration and particles of
fire, dirt and smoke).  Shell spots wander around a bit between shots, while saying near
their authored location.

Outputs have been added to the ex_gameplay entity to register kills made by players on each of the teams.
This should allow development of more Team Dealthmatch style maps.
We  have also added to the ex_gameplay entity options for mappers to freeze the spawn locations used by teams.
Ammo shrines can now be configured to dispense ammo for free (for use in the lab maps).

csm_trench has been updated to use shell spots and new shell props, added more sound effects,
lights and fixed some player clipping issues in csm_trench.

Moved the garage objective in ex_bunker to a position where I hope it will be easier to
capture (but not too easy) to  prevent further 1st objective stalemates.  Turned all
ex_bunker dropzones to face the entrance to their spawn room.

Boltguns are faster with less recoil and more magazine but weaker to balance them out.
Reduced bolter kick from 0.8 to 0.63. 

Player stance now effects spread and weapon kick.  Running and jumping increase the spread
of shots, while standing still and crouching decrease the spread.  If you want to be accurate with the new bolter it is important that yout not be charging about and pogoing while firing.

Imperial Balance Changes
Bolt Pistol combos either shoot or melee attack, you can no-longer do both at once.

Reduced the cost of flamer specialists to 50 points.

Granted the Meltagun back to the Specialist classes at a cost of 75 points.
Buffed Meltagun range from 700 to 900.
Nerfed Meltagun "clip" size from 30 to 20
Buffed Meltagun rate of fire from 0.2s to 0.1s per shot.
Nerfed Meltagun damage per shot from 12 to 8 per hit.  Which should kill a terminator at
arms reach with one full tank.
Nerfed  Dreadnaught armour resistance to Melta attacks.

Reduced the cost of plasma specialists to 105 points.
Nerfed Plasma bolt size from 8x8 to 6x6 (4x4 for pistols)
Nerfed plasma bolt speed from 4000 to 3500 (fixes a plasmagun accuracy bug).

Chaos Balance Changes
Chain axes are now slower, but more damaging than Chainswords.
Nerfed Dreadnaught armour resistance to Melta attacks.

Tyranid Balance Changes
Nerfed tyranid weapon combos so they cannot use both attacks at the same time.

Nerfed the tyranid warriors ability to absorb weapon recoil, so stance will have a greater effect on their accuracy.

Buffed Devourer ammo regeneration rate from 0.75 to 0.5 seconds per shot (both warrior and fex versions).
Nerfed Warrior Devourer damage from 26 per shot to 23 per shot. to give the same DPS as the shotgun.
Nerfed Warrior Devourer range from 3000 to 1000 units to match the shotgun.
Tweaked the Warrior Devourer to fire 5 pellets per shot (4 damage per pellet).  Making it easier to hit, but less effective against armour.

Buffed Warrior Venom Cannon range and damage by 40%.

Nerfed the Barbed Stangler's accuracy from 4 degrees spread to 40 degrees.

Reduced Carnifex class cost from 250 to 175 points.
Nerfed Carnifex armour so that boltguns can hurt it again.
Decreased Carnifex Screamer Killer wargear cost to 0 points.
Increased Carnifex Devouer wargear cost from 50 to 100 points.
Increased Carnifex Venomcannon wargear cost from 175 to 250 points.

Buffed Biovore spore mine launcher by reducing the spread from 15 degrees to 5 degrees.
Deployed sporemines now home in on players that have been scouted by Genestealers.

Map vote menu shows how many votes each map has received.
Reduced the subset of options in the map vote menu to a more manageable number.
Map vote notifications show how many votes the map has.

Tweaked imperial space marine, Terminator, Specialist and Assault marine hit boxes to bring them in-line with the CSM hitboxes. 

New helmet style for the veteran class (related to IMP texture pack work).

Primary/default weapons are now in slot 1, except for the Narcathium.
Frag Grenades are now in slot 2.
Knives and Narcathium are now in slot 3.
The solo bolt pistol is now in slot 4.

Remove the powerfield effect from the spacemarine powerfist to try and avoid a crash.

Bug Fixes
Cancelling the wargear menu returns you to the class selection menu.
Selecting the team you're on from the Team menu shows the Class menu, but only if you're already dead.

Fixed a crash bug with the Chaos Dreadnaught (actually related to hints for new classes)
Fixed a crash bug relating to notices about objective captures and map votes.
Fixed the chaos havoc crouching with a heavy bolter animation, so he does not appear to levitate.

Future Plans
Out of beta. So, is this it? Is its done? Is this the final version of EX?


Since we started work on this release the excellent modeller and texture artist Joazzz has joined the EX community and pledged to make all new spacemarine models from scratch. A monster undertaking.  Here are just a few of things he's been working on:

Joazzz did not come alone either, he brought two of his mates with him. Kharos and Warekit are both Source Film Maker animators and have offered to animate all the new models that are being added. This is the first time in the long history of the mod that we have dedicated animators working on EX (you can tell, I know).

Minor versions of EX will continue to be referred to as "Alphas". With all these contributors and more there will be plenty of Alphas to come.

by ChromeAngel - July 13, 2018, 08:03:17 PM - Discuss

Full Version - Release Candidate 2

This week's download is the seconds Release Candidate for the full version of Exterminatus, which will replace the previous Beta version.  Release Candidate 2 (RC2) enables custom chaos legion skins, improves balance between CSM and LSM and fixes a bug with the default map cycle.

Installer RC2 ( 1.35gb )

7Zip Archive RC2 ( 1.35gb )

This is a Beta release that rolls up all the changes since the previous roll up back in January.  As such their is no patch available this week, just the installer and a 7Zip archive of the full mod.  It also installs to the "ex" folder, rather than "ex_alpha"

The ModDB mirrors unlock at 12:00 GMT, if it's busy or not working the installer can be downloaded from 40ksource.com.  Please try the ModDB first.

Install the Source SDK Base 2013 Multiplayer
  • Navigate to the "Tools" section on your Steam games "Library"
  • Install the "Source SDK Base 2013 Multiplayer"
  • Run the Source SDK Base 2013 Multiplayer at least once.
  • You can exit once the menu has finished loading.

Install the latest Exterminatus Release Canidate
  • If you already have a copy of the EX Beta, delete it.
  • Run the installer and follow it's instructions.
  • Restart Steam.  You should now see both the Exterminatus Beta release canidate listed in your library.

  • Tweaked the sawbones bolter and chainsword combo to work exactly like it's imperial counterpart.
  • Tweaked the Flamer and Melta code to try and prevent dropped weapons from spewing particle effects.
  • Enabled custom legion skins by default.

  • Buffed the chaos bolter reload speed to match it's imperial counterpart.

Future Plans
Depending on how testing of this second release candidate goes we may go ahead and release the first full version of Exterminatus in a couple of weeks time.

As usual as this time any assistance with  publicising the mod, either by spreading the word, or supplying me with screenshots, demos or videos of EX can help make the full version release the success it deserves to be.

As well as the new models an animations mentioned last week, DontAsk4470 has been re-working the voice over and White has been doing more work on EX maps.  So there is plenty more content to come, even once the full version arrives.

by ChromeAngel - June 17, 2018, 10:13:25 AM - Discuss


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About Exterminatus

The three sides are featured in the current version of EX are the Imperium of Man (represented by marines of he Adeptus Astartes), the Tyranid Hive Mind (represendted by creatures of Hive Fleet Behemoth) and the Chaos Legions (represented by chaos marines of the Black Legion).

Each of the many 40k themed maps in EX plays through a series of objectives, capturing the final objective delivers victory to your team. Players that do well in combat or by capturing objectives are rewarded with the option to play better classes. Each team has several playable classes, each with their own weapons and play style.

Missiosn vary from defense of towering gothic, imperial cities to the mechanised forge worlds of the adeptus mechanicus and the frozen wastes of Tasis IV.

More information about the gameplay of EX can be found in the player manual. If you have any questions please feel free to post them on our Discord or the game group discussion board.


All trademarks (c) by GAMES WORKSHOP Ltd. This project is in no way affiliated with GAMES WORKSHOP.