QWOP

Play Online
Also check Pole Riders (online & PS3)

Stair Dismount

One of the earliest ragdoll physics games. Original Mac version not online anymore

Flappy Bird

Not Tetris

Download PC/Mac

Also check:

“Pacman now moves absolutely realistically: Because physics”

Tug the Table

Play online

Soccer Physics

Play online

Noby noby boy

PSN

Envirobear 2000: operation hybernation

Download Mac/PC iPhone

Crayon Physics

Elegant walkthrough
Free demo paid full, all platforms

World of goo

Paid downloadable, all platforms

Incredipede

Paid downloadable, all platforms

Osmos

Paid download, all platforms

Limbo

Paid download, all platforms

How do you do it?

Play online

The Cat and the coup

Download PC/Mac