Building comparison
head to head
Half-Life 2vsMarble Skies
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.
Half-Life 2
Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Marble Skies
Execution · Pure Mechanics
A 3D marble-rolling platformer through skyborne courses.
Half-Life 2 leans Execution (Pure Mechanics); Marble Skies leans Execution (Pure Mechanics).
Half-Life 2Marble Skies
Axis by axis
Execution6 vs 7
Marble Skies leans a little harder on execution, though the gap is small.
Half-Life 2
Gravity gun and shooting demand precision.
Marble Skies
precise marble control through 3D courses
Reads1 vs 0
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Marble Skies
no opponent, solo time-trial platforming
Variance1 vs 1
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Almost no randomness.
Marble Skies
fixed level layouts, minimal randomness
Optimization3 vs 3
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Linear progression with no builds.
Marble Skies
route memorization for best times
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.