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

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

Execution · Pure Mechanics
A frantic SNES space-western gallery shooter about dodging while you shoot.
Half-Life 2 leans Execution (Pure Mechanics); Wild Guns leans Execution (Pure Mechanics).
Wild Guns leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Wild Guns
Simultaneous aiming and dodging defines the whole game
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Wild Guns
Enemy waves are fully scripted
Wild Guns leans a little harder on variance, though the gap is small.
Half-Life 2
Almost no randomness.
Wild Guns
Bullet spawns vary slightly until patterns are absorbed
Wild Guns leans clearly harder on optimization.
Half-Life 2
Linear progression with no builds.
Wild Guns
Stage routing and pattern memorization converge for high scores
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.