Mechanics
Procedural Animation
Animations generated by math at runtime instead of being hand-crafted frame by frame.
Characters
GLaDOS
A passive-aggressive murder computer so well-written she basically redefined what game AI villains could sound like.
Esports
Roster Changes
The high-stakes decisions about who stays, who goes, and who joins that can make or break a competitive team.
Consoles
TurboGrafx-16
NEC's hidden gem that arrived first, fought hard, and got crushed between two giants.
Iconic Games
Halo: Combat Evolved
The game that sold the Xbox and proved console shooters could rival anything on PC.
Based on infomaxxxing codebase