Building comparison
head to head
PortalvsViewfinder
Portal asks more than Viewfinder, and the gap is execution.
Portal
Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Viewfinder
Optimization · Pure Optimization
A puzzle game where photographs layered onto the world physically rebuild missing geometry.
Portal leans Optimization (Pure Optimization); Viewfinder leans Optimization (Pure Optimization).
PortalViewfinder
Axis by axis
Execution4 vs 2
Portal leans clearly harder on execution.
Portal
Portal placement timing modest.
Viewfinder
Placing photo layers needs light spatial precision
Reads0 vs 0
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
No adversary modeling player.
Viewfinder
No opponent; photograph-based puzzle
Variance0 vs 0
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
Deterministic chambers; no randomness.
Viewfinder
All scenes are deterministic
Optimization8 vs 8
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
Pure puzzle-solving optimization.
Viewfinder
Deducing which photo angle reconstructs the geometry needed to progress
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.