Me learning about the holy trinity of Tanks, Healers, and DPS after playing WoW for 3+ years.

Me thinking persona fusion was an optional feature until halfway through p4

Me with DMC3. I didnt know how to swap weapons at those shrines, went as far as not taking the shotgun in a new playthrough to get another gun (I didnt know english at the time so i couldnt read the menus and stuff)

Three playthroughs into RE3 remake, discover the dodge mechanic.

Bullshit orbs in xenoblade chronicles 2

Don't call me out like this

Me finding out how Skill trees/links work in xenoblade

Me with stat points in ME1

Basically this video: youtube.com/f_dy9a8ElAQ

I can't remember the game but I remember beating a game without ever knowing an important mechanic existed.