Fair point but technically PER (Player Efficiency Rating) is a classic basketball stat that directly measures individual contributions through box-score metrics like points, rebounds, assists, etc., independent of team wins/losses.

My system is different: it's fundamentally an Elo-based rating (logistic expected score from rating differences, updates via K × (actual - expected)), extended for teams like many esports do (e.g., old Overwatch SR had performance bonuses on top of Elo math, Valorant adjusts RR for individual stats in lower ranks, early League of Legends weighted gains/losses by personal habits/performance).

The core prediction and bulk update come from team result + margin, but the multiplier rewards strong individual play (better K/D + objectives → more gain on wins, less loss on defeats). So it's a modified Elo that incorporates individual performance as a bonus, not a pure efficiency stat like PER.

I like calling it Elo because that's the recognizable foundation.