head to head
Destruction Derby 2 asks more than Half-Life 2, and the gap is variance.

Execution · Pure Mechanics
A demolition racing game where causing crashes scores points and your own car degrades realistically.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Destruction Derby 2 leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
Destruction Derby 2 leans a little harder on execution, though the gap is small.
Destruction Derby 2
Surviving and steering through wreck-strewn packs takes skill.
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.
Destruction Derby 2
AI drivers crash by script, not adaptation.
Half-Life 2
Combine AI scripted, non-adaptive.
Destruction Derby 2 leans clearly harder on variance.
Destruction Derby 2
Pile-ups and damage cascades are highly unpredictable.
Half-Life 2
Almost no randomness.
Destruction Derby 2 leans a little harder on optimization, though the gap is small.
Destruction Derby 2
Targeting hits for points and protecting the radiator is learnable.
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.