Best Mods for Warhammer 40,000: Space Marine 2 in 2025

Warhammer 40,000: Space Marine 2 has been out for about six months now, keeping a loyal niche happy and playing all throughout. This might be a sign that Space Marine 2 is, in fact, pretty good, and that you don’t need live service trickery to maintain a healthy player base.

But that’s not the kind of insight we care about today.

You’re here because you want more Warhammer. Weirder Warhammer, if such a thing exists. Troublingly unbalanced, entirely untested Warhammer. Too many enemies, a dozen friendlies, multiplayer bots in single players, stuff that will make your game crash — the works. If that’s you, here are a few Space Marine 2 mods to get you started.

Project Rubicon

Project Rubicon is a small, unique mod that completely changes the combat of Space Marine 2 by making kills restore a fraction of your health. Think DOOM Eternal, but a lot jankier and without glory kills. The specific rules are a little different (kills restore armor, finisher moves restore health) but the objective is the same.

Together with the damage increase for both enemies and players packaged in the same month, Project Rubicon turns Space Marine 2 into a much swingier game in which there’s no safety behind your massive armor. Relentless aggression is the only viable strategy.

Disable Intros

A staple of every game mod list, Disable Intros does exactly what it says on the cover. There isn’t much to add, it’s just a mod that removes the unskippable logos that play every time you turn on the game.

Hopefully, you’ll be able to keep this mod installed when participating in online games, even if Space Marine 2 doesn’t allow mods in public matches anymore. If the game won’t let you join a public lobby with this mod on you can just disable the mod. Please don’t risk getting banned to skip 10 seconds of logos. You can get a mod that lets you use mods in online public matches, sure, but is it really worth it?

Deluge

Deluge - Larger Squads and Enemy Spawns is a long name for a mod, but at least it makes itself clear. If Space Marine 2 left your craving for tyranids and chaos unanswered, or if you wish every mission would inundate you and your squad with just too many enemies, this is the mod for you. However, a deluge of practice targets requires an adequate number of manned guns, and for this, too, you can trust Deluge.

Your squad can have as many as ten members, though that depends on the kind of squad you pick. The Nexus Mods page mentions that Deluge is not balanced, nor is it meant to be. Let’s be honest, if you’re eyeing a mod like this your first thought is probably not “Does this provide a fair and balanced challenge?”

Better Feeling Weapons

Despite its name, Better Feeling Weapons is as much about game feel as it is about rebalancing difficulty by adjusting the weapons’ damage, mostly in the player’s favor. Needless to say, this is another not-quite-balanced mod. But then again, so are they all. Better Feeling Weapons changes the behavior of most weapons in the games in a few key areas, with the damage increase being the least interesting.

Staggering was changed significantly, with some weapons now able to interrupt the tankiest units in the game in a few hits, making those massive guns feel more like their size. Weapon spreading, which normally increases the longer you hold the trigger, now regenerates at different rates depending on the weapon. Finally, the weapon kick has been somewhat tweaked.

Enhanced Melee

Unlike other combat overhaul mods, Enhanced Melee isn’t unbalanced. In the words of the creator, “This mod is technically overpowered”, an important distinction that I’m grateful was made clear. The bonuses granted to close-quarters fighting in this mod are frankly absurd, and hand-to-hand fighting is completely broken.

Common weapons get a damage bump of 60%, faster combos, and easier parrying that triggers early and stays active for longer. Better melee weapons get even better bonuses, with Relics being 240% stronger and a parry time that is seemingly five times longer than before.

Astartes Overhaul

Warhammer Workshop’s Astartes Overhaul is probably the biggest mod for Space Marine 2, with new weapons, reworked existing equipment, three new classes, and more customization. But while this is the flashiest part of the mod, much more has been changed than has been added. This includes rebalanced player health and damage, longer enemy waves, and better companion AI (though it’s hard to tell exactly how it has been made better).

Astartes Overhaul is a great mod if you want a slightly harder, probably less balanced experience that trades immediacy for depth and accuracy to the Warhammer 40K lore.

Active AI

Unlike some elaborate AI overhaul mods, Active AI is a simple modification that reduces the downtime between actions taken by enemy and friendly NPCs. In vanilla Space Marine 2, it’s not rare to see enemies form a crowd around you without doing anything, waiting politely until you’re done killing their friend. The same can happen to your bot companions, which is even weirder since they take turns shooting their ranged weapons.

What Active AI does in practice is to remove the countdown between simple actions like attacking and dodging for every NPC, friendly or foe. It also makes it more likely that your companion will change their target when necessary and makes their ultimate ability charge up faster. Like many other mods, Active AI assumes you’ve installed the Astartes Overhaul mod, though it should be possible to run it alone.

Noclip

Noclip sounds like a very straightforward mod, something that lots of games come packaged with as a cheat or console command, but that’s not entirely accurate. Noclipping, in this case, doesn’t refer to the ability to phase through walls and go out of bounds by removing collisions between your character and the game world. Instead, in this case, the limitation on the flight distance of Camera Mode is what's lifted.

For some reason, Space Marine 2’s otherwise solid Camera Mode kept a tight leash on the player, forcing them inside a tight range around the main character. This made taking panoramic shots impossible, as well as forcing the not especially appealing protagonist into every picture. Noclip is the long-awaited solution to an extremely minor problem, as every good mod should be.

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