1 PCs/NPCs Party Perception Skill check,GM or Ambush Side Perception Skill check.
2 Act their Action by Perception Skill check Result MAX order.
1 PCs/NPCs Party Survival Skill check MAX Result(A) vs. GM or Ambush Side Stealth Skill check MIN Result(B).
2 if A >= B,then goto Normal Encounter. else only GM or Ambush Side get 1round Free Attack,goto Normal Encounter.
1 GM or NPCs Side Survival Skill check MAX Result(A) vs. PCs/NPCs Party Stealth Skill check MIN Result(B).
2 if A >= B,then goto Normal Encountr. else only PCs/NPCs Party get 1round Free Attack,goto Normal Encounter.