The Tactics Decoder

Help me recognise and counter the tactics being used on me.

What's happening in the negotiation: [DESCRIBE THE BEHAVIOUR]
The context: [DESCRIBE]

Provide:
1. The tactic(s) likely being used (good cop/bad cop, deadline pressure,
   nibbling, extreme anchor, take-it-or-leave-it, fake authority)
2. What each is designed to make me do
3. How to counter each calmly without escalating
4. How to name the tactic to defuse it, if useful
5. How to keep the negotiation on interests and merits

Help me stay composed and not react to manipulation — and know when
walking away is the right counter.