This is a list of "physics-based" games that require perseverance, problem solving, and deductive reasoning to successfully play. 

3 Slices
Fantastic Contraption 1, Fantastic Contraption 2, OR PRIUS EDITION
Cargo Bridge 1 OR Cargo Bridge 2
Weighty Birds
Incredibots
Nitrohaul
Flight
Civiballs
Assembler


New:
Test Pilot
Gravity Master
Simple Motions
Bloxorz
Squarus
​Pigs Will Fly
Hitbox
Elemental Balance
​Interlocked
​Bridge Craft

Newer:
Wallace's Workshop

Newest:
Color World Origins