BalancedSharedUpgrade

When an upgrade is used everyone has a chance of getting that upgrade on top of the user instantly getting it. Percentage chance is based on how many players are in the lobby.

1 player = 100% (so double upgrades if you play solo) 2 players = 50% 3 players = 33.333% 4 players = 25% 5 players = 20% 6 players = 16.666%

Corrected the chance condition. previously it was increasing the chance as more players were playing together