Tonic Collector Achievement

  • Tonic Collector

     

    50

    Collect or Invent 53 Tonics in the Physical, Engineering and Combat tracks.

     

    Some of these are received by research, some are found hidden in the levels and some are given as gifts by the Little Sisters. You need to save every Little Sister to get this achievement, seeing as they give you a tonic as a gift at the end of the game.

    Check this thread for all the locations.

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