head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

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

Execution · Pure Mechanics
A rail shooter testing aim and QTE timing against fully scripted spawn sequences.
Half-Life 2 leans Execution (Pure Mechanics); Rambo: The Video Game leans Execution (Pure Mechanics).
Rambo: The Video Game leans a little harder on execution, though the gap is small.
Half-Life 2
Gravity gun and shooting demand precision.
Rambo: The Video Game
On-rails aim and QTE timing are nearly 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.
Rambo: The Video Game
Every enemy popup is scripted to the frame
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Almost no randomness.
Rambo: The Video Game
Identical sequences every run, nothing hidden
Rambo: The Video Game leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Rambo: The Video Game
Memorising spawn order and cover beats turns runs into routine
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.