head to head
Neither is simply harder - they are hard in different places. Half-Life 2 demands more optimization; Wild Gunman demands more execution.

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

Execution · Pure Mechanics
A raw reaction-time test against randomised quick-draw timers.
Half-Life 2 leans Execution (Pure Mechanics); Wild Gunman leans Execution (Pure Mechanics).
Wild Gunman leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Wild Gunman
Pure draw-speed reaction to the fire signal
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Wild Gunman
Gunmen are timers, not minds
Wild Gunman leans a little harder on variance, though the gap is small.
Half-Life 2
Almost no randomness.
Wild Gunman
Which gunman draws and when is randomised
Half-Life 2 leans clearly harder on optimization.
Half-Life 2
Linear progression with no builds.
Wild Gunman
Nothing to solve beyond reacting faster
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.