: Deciding whether to save or harvest Little Sisters , or whether to spare NPCs like Grace Holloway , will significantly impact your ending and the rewards you receive later.
: Use the research camera on every new enemy type (especially Splicers and Big Sisters ) immediately. Maxing these tracks early provides vital damage bonuses.
: Use oil spills and water pools to trap enemies with fire or electricity for efficient kills.
: This is often the second major level where you enter the station to meet Brigid Tenenbaum .
: Use a utility like WinRAR or 7-Zip . Right-click part1.rar and select "Extract Here." The software will automatically pull data from part 2 and subsequent files to reconstruct the full installer.