Building comparison
head to head
Half-Life 2vsMetal Slug 3
Metal Slug 3 asks more than Half-Life 2, and the gap is execution.
Half-Life 2
Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Metal Slug 3
Execution · Pure Mechanics
Arcade run-and-gun whose one-credit clears demand total spawn memorization and twitch.
Half-Life 2 leans Execution (Pure Mechanics); Metal Slug 3 leans Execution (Pure Mechanics).
Half-Life 2Metal Slug 3
Axis by axis
Execution6 vs 9
Metal Slug 3 leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Metal Slug 3
one-hit deaths demand frame-level dodging and aim
Reads1 vs 0
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Metal Slug 3
every enemy wave is scripted
Variance1 vs 2
Metal Slug 3 leans a little harder on variance, though the gap is small.
Half-Life 2
Almost no randomness.
Metal Slug 3
branching paths vary runs slightly
Optimization3 vs 6
Metal Slug 3 leans clearly harder on optimization.
Half-Life 2
Linear progression with no builds.
Metal Slug 3
memorizing spawns is the path to a one-credit clear
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.