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Skyrim & Fallout 4 Got a Realistic Weight-Based Movement Inertia System

Modder ‘Zzyxzz’ has just released a new mod for both Skyrim and Fallout 4 that adds to them a realistic weight-based movement inertia system. This mod will make movement in these two Bethesda games feel more realistic. So, let’s take a closer look at it.

In both Fallout 4 and Skyrim, player movement feels responsive and game-like, but it lacks a sense of physical weight or momentum. Characters can instantly accelerate, stop, or change direction without feeling grounded, which creates a subtle break in immersion. Carrying heavy gear should meaningfully affect how you move. It should affect how quickly you can turn, how fast you can stop, and how stable you feel during sharp maneuvers.

And that’s exactly what this mod aims to improve. According to the modder, it introduces weight-based movement inertia directly at the engine level. Acceleration and deceleration are now smoothly adjusted, and your carry-weight ratio dynamically affects how responsive your character feels.

Heavier loadouts will lead to slower acceleration, greater resistance when changing direction, and a stronger sense of momentum. Sharp turns will also trigger a realistic slowdown, especially when you’re heavily encumbered.

The system takes cues from modern tactical shooters known for their grounded movement and weight simulation. As such, we can now have a more realistic feel to both Fallout 4 and Skyrim, without sacrificing overall responsiveness.

Overall, this is a cool mod that some of you may appreciate. You can go ahead and download the Fallout 4 version from here, and the Skyrim version from here. At the end of the article, you can also find two videos. These videos highlight the new inertia system, so be sure to check them out.

Speaking of Skyrim, here are some big fan expansions for it. The First one is Wyrmstooth. Wyrmstooth will add new quests and dungeons to the game. Then there is this mod, which brings elements from The Witcher games into SkyrimDragon Hall Tavern is a huge 2GB mod that adds quests, new places, an arena, and more. Then there’s  Land of VominhemApotheosis, and Legacy of the Dragonborn. Don’t forget to also check out this Castlevania-inspired mod. Modders have also recreated the classic PSX game, MediEvil, in SkyrimShumer and the Priest Kings is another DLC fan expansion mod with over 200 locations and 180+ quests. You can also download these Call of Duty and World of Warcraft mods. Oh, and here is another one that adds the cool Nemesis system from Middle-earth: Shadow of Mordor to it. Lastly, we have this mod that adds six new islands to explore.

And that’s not all. Skyrim has other mods that add lots of cool stuff. For instance, this mod allows you to destroy a lot of objects. You can also download this mod that makes the NPCs smarter. With this mod, NPCs will now have a dynamic AI system, and they’ll seek cover. Let’s also not forget this mod that adds a dynamic sanity systemSkyPal is another must-have mod. This mod brings Skyrim and Pokemon together, allowing you to become a Beastmaster.

In December 2025, we shared a mod that added support for NVIDIA DLSS 4.5 and AMD FSR 4.0 Redstone. Unfortunately, this is a paid mod. Thankfully, though, Community Shaders adds support for DLSS 4, XeSS, and FSR. These are free to everyone.

Then we have this mod that adds a real-time dismemberment system. There is also a 112GB Mod that remasters all 32,000 textures to 8K. Oh, and let’s also not forget this Studio Ghibli-Style Overhaul Mod.

If, on the other hand, you are into Fallout 4, you might also want to check out these other mods for it. For instance, there is a LOD mod that reduces distant object/shadow/texture pop-ins. Then we have the Disk Cache Enabler Mod. There’s also a mod that adds ragdoll physics and collisions to dead bodies. Another amazing mod is this one that fixes the game’s long loading times. DirectHit is a mod that overhauls the AI of enemies. And let’s not forget this mod that adds real locational damage to all enemies. We also have this mod that adds to the game 10 driveable cars/vehicles with Havok physics, as well as this Enhanced Movement Mod. Modders have even brought Fallout: New Vegas’ skill system to it.

To improve the graphics or performance, you can use the following mods. If you don’t like this latest HD mod, you can either download this 8K Texture Pack or this 41GB 4K Texture Pack, which optimizes all 40,962 textures. There’s also a mod that improves the faces of over 1450 NPCs. Plus, there is a mod that adds support for NVIDIA DLSS 2, AMD FSR 2, and Intel XeSS. And let’s not forget the free AMD FSR 3.0 Frame Gen Mod.

America Rising 2 is another fan DLC/expansion mod that integrates the Enclave faction into the main story with 24 main quests. Hunter’s Abyss and Caves Of The Commonwealth are two other fan expansion mods. Let’s also not forget Fallout London, which looks promising. Misery Island is another DLC-sized fan expansion. You can also download Sim Settlements 2 – Chapter 3Whispering Hills, which is a cool Silent Hill mod, and The Wilderness Mod. Plus, there is a horror quest mod that is inspired by Lovecraft, Resident Evil, and Dead Space. A few months ago, we also shared a brand new dark quest mod, called Project A.R.E.S. Let’s also not forget Atom’s Retribution, which offers 24+ hours of gameplay and 40+ new quests. Oh, and the Mass Effect Evolution Mod is once again available for download.

Have fun!

Fallout 4 - Inertia - Physical Movement Response System - F4SE

Skyrim Mod - Inertia - Physical Movement Response System - SKSE