Rope arrows don't save you from projectiles. Lockpicking has nothing to do with enemies. The rest are consumables, that have limited uses. There's difference between hiding in shadows or out of line of sight, not making noise, and hiding in a completely safe zone, which isn't reachable by anyone and anything. It's almost a cheat because it's easy to abuse without any shortcoming. Alien: Isolation is so tense because there are no safe zones. The xenomorph adapts and will find you anywhere.
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