head to head
Split/Second asks more than Half-Life 2, and the gap is variance.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.

Execution · Pure Mechanics
An action racer where players detonate the environment itself to wreck rivals and reroute the track.
Half-Life 2 leans Execution (Pure Mechanics); Split/Second leans Execution (Pure Mechanics).
Split/Second leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Split/Second
Drafting, drifting and dodging collapsing set pieces.
Split/Second leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Split/Second
Timing powerplays against human rivals rewards prediction.
Split/Second leans clearly harder on variance.
Half-Life 2
Almost no randomness.
Split/Second
Triggered explosions and route changes upend races constantly.
Split/Second leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Split/Second
Knowing every trap and shortcut converges with play.
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.