Also before good cop/bad cop really kicks in fully things like blowing hot and cold (this can be the start or a technique on it's own).
It's not quite as aggressive but it works in the same way it keeps you on the back foot. Sometimes confused but ultimately reaching to either work harder for them or give them space - is generally how it manifests in the partners that will be malliable or open to progression of these kinds of manipulaive behaviours.
As JennyLee says - sulking or silent treatments.
Space invasion. Unilateral decision making.
Inappropriate reactions - that's kind of my umbrella but even before they let themselves go fully you tend to see one off instances of wildly off beaviour, like a really angry reaction to a trivial matter, really holding a grudge and bringing up something hours/days later that was all sorted and not grievous, being really hurtful or malicious in responce to even a lighthearted disagreement those kind of things - easily written off ONCE as a bad day but still crop up
Bedroom weirdness- moving too fast or 'oddly' slowly, 'forgetting' a condom was agreed on, trying something without consent (could be anything but for instance accidentally slipping and 'every other gf has liked anal, I thought you would), possibly being much more aggressive or prescriptive than in every day life. Knowing what you would like/be happy with better than you. Not listening. Continuing after you've said no then trying to brush it off as misunderstanding (tickle fight or something, you were laughing so it was ok).
I like Snorbs' article. Will save it.