I love this demo but the main thing I hated was not knowing if I was looking at an enemy or a friendly so most of the time I'd walk up to them and either wait for them to turn and shoot me or for them to turn and kill me instantly because they had a shotgun.
Viewing post in Project Silverfish DEMO comments
They were given distinct uniforms patch or so back, now the trick is to look for a color scheme! Unless you're doing some goofy reputation stuff (which there is no point or reward to doing so then just challenge) by default you will be non hostile with two factions, and hostile with the other four factions.
The two friendlies are:
Freelancer: Woodland digital camo and/or green, usually dark green. No armband or green armbands.
Revolution: Red, or red and grey digital camo. They have red headbands/armbands.
The four hostiles are:
Cultists: Purple, lots of purple. Usually carrying a glowing orange gun too. Purple armbands.
Insurrection: Probably the most common enemy you'll encounter, they wear casual clothing, but with bright yellow/orange armbands or headbands.
Military: More common in some maps, they wear a light grey digital/urban camo.
Loners: Not so much a faction as just factionless, they are hostile to everyone else (even other loners) but their own squad. They often wear dark clothing with no armbands or visual identifiers.
I hope this helps!