head to head
Legend of Grimrock 2 asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
Party-build math and grid-puzzle logic with light real-time repositioning.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Legend of Grimrock 2 leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans a little harder on execution, though the gap is small.
Legend of Grimrock 2
Square-dancing around monsters needs modest real-time timing
Portal
Portal placement timing modest.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Legend of Grimrock 2
Monsters follow fixed grid behaviors
Portal
No adversary modeling player.
Legend of Grimrock 2 leans clearly harder on variance.
Legend of Grimrock 2
Secrets and puzzles are hidden until discovered
Portal
Deterministic chambers; no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Legend of Grimrock 2
Party builds, puzzle logic and resource routing dominate
Portal
Pure puzzle-solving optimization.
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.