Board Thread:New on Sword Art Online Wiki/@comment-173.63.144.156-20140911012946/@comment-3551173-20140911021559

Same point as Wraiyf, but ALO's darkness established the potential for VRs to affect the players directly (e.g. mind control) and not just the world around the players.

SAO's darkness was through controlling the life and death of players, and imprisoning them, it established how the world shapes the player and how they act (Laughing Coffin)

I suppose I'll add GGO's darkness that the dissonance between strength in VR and RL can lead to pain and anger, but also the blurring between acceptable actions in VR and unforgivable in RL.

Well this is just my opinion so wrong or right take away what you want.