Building comparison
head to head
Oxygen Not IncludedvsVampire Survivors
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.
Oxygen Not Included
Optimization · Pure Optimization
Engineering precise gas, liquid, and power circuits to keep a subterranean colony alive indefinitely.
Vampire Survivors
Optimization · Pure Optimization
An auto-attacker where picking the right weapon evolutions wins by itself.
Oxygen Not Included leans Optimization (Pure Optimization); Vampire Survivors leans Optimization (Pure Optimization).
Oxygen Not IncludedVampire Survivors
Axis by axis
Execution1 vs 1
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Oxygen Not Included
All inputs are build-order clicks; no twitch required
Vampire Survivors
Movement is trivial; no aim or precision required.
Reads0 vs 0
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Oxygen Not Included
No adversary of any kind exists in the colony
Vampire Survivors
Enemies follow fixed spawn scripts; no adaptive opponent.
Variance5 vs 4
Oxygen Not Included leans a little harder on variance, though the gap is small.
Oxygen Not Included
Asteroid seed and geyser placement carry meaningful but bounded randomness
Vampire Survivors
Level-up offerings and pickup drops are randomized.
Optimization10 vs 9
Oxygen Not Included leans a little harder on optimization, though the gap is small.
Oxygen Not Included
Gas, liquid, and power engineering are essentially a solvable engineering puzzle
Vampire Survivors
Evolution paths and weapon combinations fully solve the run.
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.