head to head
We Are Doomed 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 twin-stick arena shooter testing reflexes and positioning for high scores.
Half-Life 2 leans Execution (Pure Mechanics); We Are Doomed leans Execution (Pure Mechanics).
We Are Doomed leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
We Are Doomed
Twin-stick dodging and aiming under swarms demand reflexes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Combine AI scripted, non-adaptive.
We Are Doomed
Enemies spawn on scripts, nothing adapting to you
We Are Doomed leans clearly harder on variance.
Half-Life 2
Almost no randomness.
We Are Doomed
Spawn placement adds modest randomness
We Are Doomed leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
We Are Doomed
Positioning and beam-charge timing reward score planning
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.