...Player metrics (or physics metrics) are factual numbers measured in-engine like player size, movement speed, maximum jump height, etc.
describes game physics, derived...

...players, for whom basic movement and avoidance were challenging enough, without monsters making it much more difficult. However, as a more advanced FPS player...

...Instead of movement or aiming, Halo is about managing damage:
"In almost every modern FPS, the player moves fairly slowly and a huge proportion...

...of Duty, players often park their camera's vertical rotation aimed at roughly head / chest height, and restrict their aiming movements to the horizontal...

...Think of their movement more like semi-chaotic pinball rather than a tactical cover shooter.
Give more ammo than the player will need. A...

...the player’s performance, the zero player level’s very shape and geometry is the performance. That performance is a dance, a movement in...

...THINK FROM THE PLAYER'S PERSPECTIVE.
Avoid abstract experience goals. Imagine the player's perspective.
For example, "the player should enjoy non-linearity" focuses...

...You know where the player must go and how much time the player will likely take.
To speed it up, add downward slopes, one...

...the player jump where they're supposed to jump?
Flow. Does movement feel slow or fast, smooth or complex? What type of movement is...

...because the player moves so quickly in Doom, and because most enemy attacks are dodgeable, the player can avoid a significant amount of damage...