Hokay, so it's a well known problem that All Points Bulletin: Reloaded doesn't support crossfire; main symptom is invisible players.
The recommended solution to this is to disable Crossfire; however people with "combination" cards (Two GPUs/cards, but one slot) do not have to option in the Catalyst drivers to do so.
RadeonPro can be used to set-up a profile for APB and disable Crossfire; but that caused a crash for me.
Setting APB to use the Unreal3 Profile had no fix.
Using RadeonPro to set APB to use Crysis's profile caused some visual glitching and a massive performance hit, although it did fix the invisible players problem.
I managed to fix the issue and get it working by using the F.E.A.R (1!) profile.
This resolved the issue of invisible players, had no tangible performance hit, and didn't degrade the graphics. The closest thing to a problem I had with it is a very occasional "flicker" on the screen, but it is only sporadic, and barely noticeable.
I am not sure how many of my additional RadeonPro settings are required to get it working as smoothly as it does for me, but if simply setting it to the F.E.A.R. crossfire profile doesn't work on its own, try changing the settings so you have the following flags:
[Texture Filtering Quality=Quality]
Using RadeonPro to launch the game will trigger additional alerts in Zonealarm (and presumabl
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