head to head
Montaro : RE 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 comedic reflex platformer testing jump timing against fast obstacles.
Half-Life 2 leans Execution (Pure Mechanics); Montaro : RE leans Execution (Pure Mechanics).
Montaro : RE leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Montaro : RE
Reflex jumping and timing carry this runner-platformer
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Montaro : RE
No adaptive opponent in a solo arcade game
Montaro : RE leans clearly harder on variance.
Half-Life 2
Almost no randomness.
Montaro : RE
Some procedural obstacles add randomness
Half-Life 2 leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Montaro : RE
Little to solve beyond reacting to obstacles
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.