Real Gear gaming thing - Head slides up when shoulders are pulled out.
Protoform Starscream - Head pops into place when shoulders are pulled forward.
Bumblebee (70's) - Hood flicks down at press of button and shins move and lock into place when feet are pulled down.
Wreckage - Shoulders and head come down when gun is pressed into back.
Brawl (Deluxe) - Head appears and front treads fold up when top of chest (front of tank) is pulled down. A personal fave. Sat there for 10 minutes doing it over and over
Jazz - Head appears and front grill pops out to let side parts slide under when roof of car is lwered. The front grill is hard to explain.
Ratchet - Knee folds out and side ' cabinet doors' on legs slightly pop out when feet are lowered. Lame. Though the cabinet doors give his legs the slight look of bulk.
Blackout - Head area flips around when legs are lowered? This one escapes me, it never works twice and I don't know what I'm doing wrong.
Optimus Prime (Leader) - Toes flip over and foot becomes evident when sole of feet are rotated and locked into place. Head appears, truck windows slide to side and 'doors' pop out when button is pressed, lights and sounds also activate. Gun flips aorund and bar slides out when button is slid.
That's all I've got for now. Feel free to add anything to the ones I have if I've missed them, or badly described them.