Building comparison
head to head
Code Name S.T.E.A.M.vsPortal
Code Name S.T.E.A.M. asks more than Portal, and the gap is variance.
Code Name S.T.E.A.M.
Optimization · Pure Optimization
Budgeting steam movement and loadouts against hidden but scripted alien positions.
Portal
Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Code Name S.T.E.A.M. leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Code Name S.T.E.A.M.Portal
Axis by axis
Execution3 vs 4
Portal leans a little harder on execution, though the gap is small.
Code Name S.T.E.A.M.
Manual third-person aiming adds a real but small hands layer
Portal
Portal placement timing modest.
Reads1 vs 0
Code Name S.T.E.A.M. leans a little harder on reads, though the gap is small.
Code Name S.T.E.A.M.
Alien AI runs fixed behaviours, never modelling you
Portal
No adversary modeling player.
Variance3 vs 0
Code Name S.T.E.A.M. leans clearly harder on variance.
Code Name S.T.E.A.M.
Unseen enemy positions and overwatch threats are hidden information
Portal
Deterministic chambers; no randomness.
Optimization7 vs 8
Portal leans a little harder on optimization, though the gap is small.
Code Name S.T.E.A.M.
Steam budgeting, loadouts and positioning are the solvable core
Portal
Pure puzzle-solving optimization.
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.