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Reddit step by step modding guide
This looks pretty thorough. Does someone want to message the author and get his permission to reproduce it here?
Give Me Deus Ex
So.. I don't know what's happening this night but I feel overcharged.
Anyway it seems this game is using "Galaxy audio system", whatever that means.
I'm posting here just for the records and considering we may list middlewares in the games infobox one day
Galaxy 3D Audio was the original audio driver used in the Unreal engine. Galaxy 3D Audio basically just uses DirectSound, which is why if you want EAX in older Unreal engine games, you need to use ALchemy, 3D SoundBack, etc..
Should I include instructions in running the game in the SGL API for older PowerVR hardware? (PCX2, Neon250)
There is a SGLDrv.dll included with the game, but it is commented out in the .int file. By installing KernelEx 4.5.1 in Windows 98/ME it will start to function, but it'll crash when you open the Load / Save Game screens.
Many other UnrealEngine 1.5 games will also work the same way, if they left a SGLdrv.dll behind.
Sure. I don't see why not. That's pretty much an "undocumented feature" defined.