Building comparison
head to head
PortalvsX-COM: Apocalypse
Neither is simply harder - they are hard in different places. Portal demands more execution; X-COM: Apocalypse demands more variance.
Portal
Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
X-COM: Apocalypse
Optimization · Pure Optimization
Ambitious X-COM entry defending a single city with real-time tactical combat.
Portal leans Optimization (Pure Optimization); X-COM: Apocalypse leans Optimization (Pure Optimization).
PortalX-COM: Apocalypse
Axis by axis
Execution4 vs 1
Portal leans clearly harder on execution.
Portal
Portal placement timing modest.
X-COM: Apocalypse
Optional real-time mode adds slight dexterity.
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.
X-COM: Apocalypse
Alien behavior is systematic, not adaptive.
Variance0 vs 6
X-COM: Apocalypse leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
X-COM: Apocalypse
Hidden enemies and random raids drive uncertainty.
Optimization8 vs 9
X-COM: Apocalypse leans a little harder on optimization, though the gap is small.
Portal
Pure puzzle-solving optimization.
X-COM: Apocalypse
City politics, economy and tech routing decide the war.
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.