Building comparison
head to head
Half-Life 2vsHeavenly Bodies
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.
Heavenly Bodies
Execution · Pure Mechanics
Zero-gravity physics game about wrestling floppy cosmonaut limbs through space-station chores.
Half-Life 2 leans Execution (Pure Mechanics); Heavenly Bodies leans Execution (Pure Mechanics).
Half-Life 2Heavenly Bodies
Axis by axis
Execution6 vs 7
Heavenly Bodies leans a little harder on execution, though the gap is small.
Half-Life 2
Gravity gun and shooting demand precision.
Heavenly Bodies
Deliberately awkward limb-by-limb zero-g control
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.
Heavenly Bodies
No opposition
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.
Heavenly Bodies
Fixed scenario layouts
Optimization3 vs 4
Heavenly Bodies leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Heavenly Bodies
Task order and clever anchor points
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.