Introduced 1 mechanic
Escape from Tarkov
Bring gear in, lose it if you die, keep it if you walk out — stakes return to the online shooter.
Mechanics this game introduced
These are recorded as first appearing here. Each links to a full history of where the idea went next.
Mechanics it built on
Ideas Escape from Tarkov inherited rather than invented — each traceable back through the ontology to a root.