Genres
Roguelike vs Roguelite
The genre distinction that has spawned a thousand forum arguments.
Game Design
Skill Floor vs Ceiling
Easy to pick up, impossible to put down -- the holy grail of 'easy to learn, hard to master.'
Iconic Games
Call of Duty 4: Modern Warfare
The game that turned the multiplayer progression treadmill into an addiction science.
Speedrunning
Lag Reduction
Shaving frames by preventing the game from slowing down, because lag frames still count on the timer.
Business
Merchandising Revenue
Turning pixels into plushies, t-shirts, and everything your shelf can hold.
Based on infomaxxxing codebase