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Anyone know how to use UE5 to Control a Unity Game?

So I somewhat play VRChat and have seen something kind of wild that I haven't thought of.
So VRChat runs off of Unity and there's a way to connect UE5 via OSC to VRChat for custom animations/slow motion/etc.

I'm wondering if anyone could help me out.
I know for sure OSC is involved.

Here's an example:

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Obs probably but i havent watched the video because i need to sign in and am too lazy to swap ip, so best guess is OBS
(Jan 19, 2026 03:16 PM)Biggy_Asian Wrote:  Obs probably but i havent watched the video because i need to sign in and am too lazy to swap ip, so best guess is OBS

na obs wouldnt do anything, he's sending ue5 instructions to vrchat through vrchat's built in osc server
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(Jan 19, 2026 03:24 PM)oRequiem Wrote:  na obs wouldnt do anything, he's sending ue5 instructions to vrchat through vrchat's built in osc server

sounds like a cheat, isnt vrchat running on ue5 or ue? just go look on unknowncheats or uc if ykwhat i mean mods dont like people giving advice to sites other than this.
(Jan 19, 2026 03:26 PM)Biggy_Asian Wrote:  sounds like a cheat, isnt vrchat running on ue5 or ue? just go look on unknowncheats or uc if ykwhat i mean mods dont like people giving advice to sites other than this.

It's not a cheat, it's vrchat's OSC server, it's like people using OVR Toolkit on steam since it's using vrchat's OSC.
vrchat is on unity, but u can control vrchat movement on ue5 somehow which is what im trying to figure out
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(Jan 19, 2026 03:32 PM)oRequiem Wrote:  It's not a cheat, it's vrchat's OSC server, it's like people using OVR Toolkit on steam since it's using vrchat's OSC.
vrchat is on unity, but u can control vrchat movement on ue5 somehow which is what im trying to figure out

yeah no clue i am completely lost, might just be one of those bullshit videos lel dont forget
(Jan 19, 2026 03:38 PM)Biggy_Asian Wrote:  yeah no clue i am completely lost, might just be one of those bullshit videos lel dont forget

its not one of those videos, it's definitely a real thing since it's through osc and ive seen other people's pov on him doing it
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Nobody has any ideas on this???
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Not sure if this can be it but I found this, I didn't look through the video properly though.

https://www.mocapfusion.com/live-link-tutorial
https://www.youtube.com/watch?v=bDVLjqRBl88
Dealing with depression can be tough. Tougher than most people know. But keep your head up high, there will always be hope.
(Jan 23, 2026 09:47 AM)baka~ Wrote:  Not sure if this can be it but I found this, I didn't look through the video properly though.

https://www.mocapfusion.com/live-link-tutorial
https://www.youtube.com/watch?v=bDVLjqRBl88

I saw that too, I'm pretty confident that isn't how what I'm talking about is done. It would look similar to the video I linked.
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