Gamorium's take

Planning a clean route through each level, then executing it without a single mistake.
the cheat-test profile
Each axis is rated on its own - how far one cheat would trivialize the game here. They don't trade off; low on all four means the game is an experience, not a contest.
cheat: Aimbot - perfect inputs
One-hit deaths demand precise shots and clean movement
cheat: Out-predict an adaptive opponent
Undead follow patrol scripts, never modelling the player
cheat: See what's hidden / map the RNG
Enemy placements are mostly fixed with minor behavioural noise
cheat: A perfect solver / coach
Planning entry routes and kill order is half the level
Each axis is named by the cheat that would break the game along it. Execution is the hands. Reads is out-thinking an adaptive opponent. Variance is hidden information & RNG. Optimization is the solvable systems layer. A game's region is the top one or two axes.
These four aren't one rating split four ways - they're independent 0-10 questions. A 9 on one axis takes nothing from the others, and a game low on all four isn't missing data: it's telling you there's no skill here to cheat.
The basis is how the majority actually plays this game - not a niche mode or a personal run. For a game with very different modes (a story campaign versus ranked multiplayer), that's the version most people mean.
Ranked by shared genre first, then by how closely the cheat-test profile matches - a cross-genre tag means a pick matched on skill profile alone.

Serious Sam: The Second Encounter
Practiced Mastery · arena horde shooter