head to head
DiRT Rally 2.0 asks more than Half-Life 2, and the gap is execution.

Execution · Pure Mechanics
A punishing rally sim where commitment at speed and smart service-park decisions decide the leaderboard.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
DiRT Rally 2.0 leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
DiRT Rally 2.0 leans clearly harder on execution.
DiRT Rally 2.0
Millimetre steering corrections at speed define stage time
Half-Life 2
Gravity gun and shooting demand precision.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
DiRT Rally 2.0
Solo time-attack format; no adaptive opponent
Half-Life 2
Combine AI scripted, non-adaptive.
DiRT Rally 2.0 leans clearly harder on variance.
DiRT Rally 2.0
Hidden surface cuts, gravel buildup and weather are unmappable mid-stage
Half-Life 2
Almost no randomness.
DiRT Rally 2.0 leans clearly harder on optimization.
DiRT Rally 2.0
Car setup and service-park tyre choices are fully solvable pre-stage
Half-Life 2
Linear progression with no builds.
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.