The Invader Feature Could Be Implemented During Missions . Other Hostile Players Invade Hub Players During Quests The Invaders Can invade With Other Players As A Team.
The Invaders Should Have Items That Neutralise Use Of Items or Casting This Would Reduce The Hub Players Survival.
This Could Also Serve As A Unique Game Mode / Class Role Called False Spawn Recruit. There Can Be A Ranking System in Pso2 On Best Consecutive invasions. The Invader After Completing Their Objective Will Receive Rewards And Titles Accordingly.
The Players That Successfully Defeat A invader Will Receive A Item / Badge To Make Something Special.
How To Stop Invasions :
The Player Can Block Invasions By Using A Item SEGA can make, This will stop invasions For A Set Period.
If The Player Has Real Players on Their Party Invaders Can Invade.
If The Player Has NPC Party Members, Invaders Cant Invade.
Invasion Examples
Invaded By False Spawn Recruit This Would Go Along With The Lore Of Pso2
Multiple Party Invasions