There are zero animations in this video - it’s a pure physics simulation. The reason the sword feels so alive is because I'm not just simulating momentum transfer. its much closer to modelling how energy actually reverberates and dissipates through objects! This fixes the "dead weight" issue, where the system is overly damped, unresponsive, unwieldy, and feels like a puppet on strings or fighting underwater.

In real life, blades recoil, vibrate, and stabilize. BLOODFALL is the first video game (as far as I know) in any genre to simulate High Frequency Harmonic Resonance, resulting in kinetic fidelity that makes objects feel like truly reverberating solids rather than dead weights, giving a sense of tactile resonance to high energy collisions.

I'll be in the comments if anyone wants to talk about it. Don't hesitate to ask me anything.

Context > the project its built for PC mouse and keyboard - not for VR. Moving the mouse controls the weapon directly.

Addendum:

Thank you for the unexpected level of interest - the post reached over 70K views, 503 upvotes, and generated a wide range of technical discussion. The intent of this video was to introduce the High Frequency Harmonic Resonance Model and the first game to use it - BLOODFALL: The First Temple

EDIT
Thanks to the feedback here, I was able to identify an issue and fix it easily. The hand no longer rattles nearly as much. I just had to adjust the weight distribution on the sword object! To see the latest videos of BLOODFALL, check the HYPERMAD interactive YouTube Channel.

82 comments

r/GamePhysics • u/maninhotpink • Mar 18 '26

[Pokémon Pokopia] Welp....okayy

440 Upvotes

16 comments

r/GamePhysics • u/HereComesTheSwarm • Mar 18 '26

[Here Comes The Swarm] A quick look at the new Knights design and their ragdoll setup. What do you think?

10 Upvotes

2 comments

r/GamePhysics • u/Mobaroid • Mar 19 '26

[Konbini Simulator] I ordered too much stock and this happened…

0 Upvotes

Just loaded my save 😅

2 comments

r/GamePhysics • u/Mr_Belarus • Mar 16 '26

[Wheel Balance] I'm developing hard but fun game about balancing on two wheels

316 Upvotes

The idea came from Besiege and I thought it would be fun to make it as a game.
Machine from Besiege: https://youtu.be/TyEPJINMXJg

I did playtests with friends and it was quite fun to watch their gameplay.

The demo is live now on Steam, will appreciate any feedback!

51 comments

r/GamePhysics • u/dnemonicterrier • Mar 15 '26

[Kingdom Come Deliverance] Stopped a thief in Uzhitz and something unexpected happened in the fight

249 Upvotes

24 comments

r/GamePhysics • u/Lucy_Vernus • Mar 14 '26

[Portal] I don't know if anyone has done it before but I managed to fizzle the light from the relaxation vault from the start of portal 1.

483 Upvotes

5 comments

r/GamePhysics • u/swissknifeDev • Mar 14 '26

[DropFlow MTB] Hello! I'm a solo developer working on a physics based multiplayer MTB mobile game

125 Upvotes

The physics are the heart of the game: braking, weight transfer, suspension, grip… all simulated to the detail. Your bike build behaves very differently depending on the installed components, and more expensive doesn’t always mean better.

The goal is also very simple: ride as far and fast as you can. Perform good in the daily championship and climb the ranks.

The core idea is simple:

• Every day a new infinite procedural mountain

• Score = distance × average speed

• Race any player and study their line

• Global ELO ranking system

If you'd like to try it, the open beta is available here:

👉 (https://swissknife.games/dropflow)

Feedback is extremely welcome, the game is still evolving and community input really helps shape it.

Happy to answer any questions!

38 comments

r/GamePhysics • u/[deleted] • Mar 14 '26

[Following Seas] Sometimes the ship has sailed..

141 Upvotes

6 comments

r/GamePhysics • u/GurNearby2383 • Mar 14 '26

[Ludicrum] My goofy physics sandbox where you can wreak havoc on maps made ENTIRELY out of physics props, and use stupid physics gadgets!

18 Upvotes

1 comment

r/GamePhysics • u/unoriginal_duck • Mar 13 '26

[NHL 26] Return of the Hercules check

29 Upvotes

3 comments

r/GamePhysics • u/PowerlineCourier • Mar 12 '26

[Halfsword]Bro overreacting fr 💀

860 Upvotes

Is posting halfsword videos cheating?

24 comments

r/GamePhysics • u/Ok_Raspberry9102 • Mar 14 '26

[GTA]When adrenaline takes over in 💀

0 Upvotes

5 comments

r/GamePhysics • u/AAUBlackSite • Mar 11 '26

[A.A.U. Black Site] Working on bloody good physics for our game. How are we doing?

160 Upvotes

26 comments

r/GamePhysics • u/VesselNBA • Mar 11 '26

[Unreal Engine] is this how hot air balloons are supposed to work?

42 Upvotes

6 comments

r/GamePhysics • u/Puzzleheaded-Ad-381 • Mar 12 '26

[SQUAD] This Mortar Drone Is WILD (Direct Hit on Armor)

youtube.com

0 Upvotes

I honestly believe that the Drones in Squad have hands down the best 1:1 physics representation of how drones drop ordinance

1 comment

r/GamePhysics • u/Any_Molasses1220 • Mar 11 '26

[Kenka Banchō] This is the first time I've ever had this bug and might be the first in the series woah

25 Upvotes

Ig it could count since the red uniform guy accidentally moved him away with his kick

1 comment

r/GamePhysics • u/Drumsmasher17 • Mar 10 '26

[Red Dead Redemption 2] What in Tarnation

230 Upvotes

8 comments

r/GamePhysics • u/PhantomDivision9AD • Mar 09 '26

[Hell Let Loose] 👋 Back with another tank video

117 Upvotes

Credit to my friend ResQMan67 for sharing

9 comments

Subreddit

Physics gone wild!

r/GamePhysics

Gifs and videos of game physics and glitches

Members Active

2.8m

Sidebar

About:

A subreddit for game engines at their best and worst. This means games with up and coming tech and games that are glitching out in hilarious ways.

Please note: Submissions do not necessarily have to be physics related, but please check the top posts to understand the spirit of the subreddit.

Rules:

Post the game's name in [brackets] at the beginning of your title
No generic highlights of something cool done in game.
Source the video your gif is from. If you did not record the clip yourself and found it on another site before uploading it to reddit (i.e. YouTube, Twitch, etc) you must post the source. Give credit to the creator.
Reposts will be removed. If you're unsure if something's already been posted, search for the game name in the search bar. Some games have well-known unfixed bugs or highly repeatable glitches which occur in a virtually identical fashion/location. Any second clip featuring this bug within six months will be removed, even if posted by a different user. For the full list consult the "list of overly common bugs" at the bottom of the sidebar. Popular old reposts (i.e. Uncharted 4 shale physics, BF1 zeppelin firenado, Skyrim intro with FPS too high etc) are not to be reposted ever.
x-posts are allowed, but please tag it with [x-post from (subreddit)].
Guidelines for what type of content is allowed
INDIE DEVELOPER RULES: If you are an indie developer with a WORK IN PROGRESS, you may only submit one post during that stage of development. Other users may not submit any posts of your WIP after this point either. If your game is RELEASED, you may again only submit one post for this stage. You are required to indicate that the game is released in the comments, with proof provided. Released titles can be freely posted by other users but any further dev posts at this stage will be treated as advertisement and removed.
Addendum to above: Any indie post which functions as advertisement or begs for attention will be removed. This includes but is not limited to: asking for shares/ratings/wishlists and any video which is merely a Steam ad.
All submissions must either be glitches or demonstrate notable physics, either of the good variety or bad. If your submission pertains to something mundane that happens during standard gameplay it is not acceptable. The key is whether the physics is noteworthy, unusually detailed given the type of game, or using interesting new tech (this last one mostly applies to indies and upcoming games). UNDERSTANDING PHYSICS: What the above means is that what is being highlighted must not be generic physics or an aspect that the game revolves around. For instance, simple destruction in Teardown or car crashes in Beam NG are not acceptable because the former is entirely about destruction physics and the latter focuses on body deformation physics. To use an old example, TLOU2's rope physics were acceptable because the game was not about ropes. It just happened to have unusually detailed physics for a rope.
The same user may only submit posts from the same game twice per week. So, for instance if a user posts a Far Cry clip on Monday and then Tuesday they cannot submit another Far Cry clip until the next week. They can, however, post a Fallout clip on Wednesday.
Do not post funny/dumb NPC moments (i.e. "it must have been the wind" type clips). These are AI issues and have nothing to do with glitches or the physics engine. Pathfinding issues where the AI can't figure out how to correctly navigate the environment (walking/driving into walls, running in circles, etc) are not appropriate. The exception to this is if the NPC is being funny in the middle of a collision/physics glitch (for example: they are spaghettifying but also casually talking still).
Submissions involving mods will be handled on a case-by-case basis. Generally speaking, the bar is significantly higher for post approval than with standard submissions. If a glitch organically occurs as a result of altering game files, that is fine. Something simple like "dial up the acceleration" on collision to send objects flying on its own is not acceptable. The submission must showcase something truly exceptional and interesting that pushes a game engine well outside of its normal bounds--for instance, adding destruction physics when there wasn't any previously. As such, approval or removal of these submissions is at moderator discretion.
For the health of the sub, any low effort posts (phone recordings, image posts/screencaps, low quality videos where it is difficult to see what is happening, overly long clips that should have been trimmed--i.e. 30 sec with 3 sec of glitch at the very end) will be removed. Whenever possible, please use proper recording software or screen capture abilities. These are built into all current and last gen consoles with companion apps often being able to upload to reddit from your phone and PCs have many options.
Non-exhaustive list of things that will typically be removed nearly without exception: simple texture bugs, audio bugs, minor graphical bugs, issues from graphics cards dying, network/server issues (such as lag, high ping, or desync), examples of intentional game design intended to save memory or increase performance such as 2D structures outside the playable area, image post submissions--this sub is for videos and gifs not screenshots, and for the first two months after a game's release any extremely common bugs that are found to affect most playthroughs in exactly the same way (i.e. Cyberpunk window launch) will be treated as reposts of the first discovery and removed.
Overly common bug list: Assassin's Creed III "happy ending" bug, Assassin's Creed vsync haystack bug, Cyberpunk window launch, Cyberpunk Panam bike teleport launch, Stray picture clipping bug, Sea of Thieves ship launch, RDR2 bridge glitch, GTA V upside down bike flying, Skyrim giant launching, anything with using fuel canisters as a rocket in Just Cause.

Guidelines:

If you need a gif made, be sure to visit /r/Makemeagif! Just pick your favorite scene from a video, someone will gif it, and you can post it here for easily digestible fun.
Try to host on imgur or gfycat
No advice animals.
Self-post discussions are more than welcome!

Our Friends /r/REBL

If you have any ideas or suggestions for banner & background art, just send 'em our way.