Basically, im trying to Livestream this game over on my JTV channel, trying to get the word out even further cause this game is epic.

i've tried everything in the config file (fullscreen 0, windowed 1 etc.)

anyone know a way?

You might be able to force it with DxWnd - can't say for sure, haven't tried it yet.

not possible since it launches from the browser and not directly from the exe. :/

The URL association just does this:

c:\path\to\client.exe "aos://123456789"

So you could try a hardcoded server URL to test it.

and how would i go about doing that?

In DxWnd right click your client.exe entry and do Modify. Grab a URL from the website and change the top box to include it like this:

C:\Games\Ace of Spades\client.exe "aos://1473137261"

then double click and it'll start windowed on the relevant server (assuming it's not full).

I'm running it windowed right now with this. Visually isn't perfect but I can alt-tab back and forth without losing health and display stuff next to the window.