@WandererUber @Azur_Fenix @Kerosene there is definetly something to be said how games add difficulty incrementally through extra mechanics and variables, there is really nothing that quake "introduces" besides the weapons, of course they are not really all that different, you point at a guy long enough and he dies.
you do the exact same thing you do in level 1 except you do it faster harder and smarter, it's not arbitrary difficulty in that there is more to juggle or that it's super punishing and precise, it's that the game demands mastery of it's mechanics and understanding on a gut level rather than the brain level.
i can't tell you shit about quake in how to deal with situations, but i have the intuition to shimmy in and out of the ogres melee range while maintaining the shamblers distance and sight, no brain used here it's all gut, and it feels great.