Building comparison
head to head
Metal SlugvsNine Sols
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.
Metal Slug
Execution · Practiced Mastery
Twitch dodging and shooting layered over memorised arcade stage routes.
Nine Sols
Execution · Pure Mechanics
Taopunk metroidvania whose parry-centric boss fights channel Sekiro in 2D.
Metal Slug leans Execution (Practiced Mastery); Nine Sols leans Execution (Pure Mechanics).
Metal SlugNine Sols
Axis by axis
Execution8 vs 9
Nine Sols leans a little harder on execution, though the gap is small.
Metal Slug
Dodging dense bullet patterns and precise shots carry every credit
Nine Sols
Sekiro-style parry timing is the entire combat test
Reads0 vs 1
Nine Sols leans a little harder on reads, though the gap is small.
Metal Slug
Enemies follow fixed arcade scripts, never adapt
Nine Sols
Bosses follow learnable scripts
Variance1 vs 1
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Slug
Spawns are nearly deterministic once a stage is learned
Nine Sols
Deterministic authored world
Optimization6 vs 6
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Slug
One-credit clears come from memorising routes and spawn patterns
Nine Sols
Moveset study, talismans, and route knowledge
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.