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

Execution · Pure Mechanics
Punishing rally car control at the limit, supported by setup and stage knowledge.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Dirt Rally leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
Dirt Rally leans clearly harder on execution.
Dirt Rally
Unforgiving car control on loose surfaces is the entire test
Half-Life 2
Gravity gun and shooting demand precision.
Half-Life 2 leans a little harder on reads, though the gap is small.
Dirt Rally
Solo time trials against the clock, no adaptive rival
Half-Life 2
Combine AI scripted, non-adaptive.
Dirt Rally leans a little harder on variance, though the gap is small.
Dirt Rally
Weather and surface degradation vary between stages
Half-Life 2
Almost no randomness.
Dirt Rally leans clearly harder on optimization.
Dirt Rally
Pacenote interpretation, setup tuning and stage memorisation
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.