Tower Emblems are collectable blue tokens that you find scattered throughout the island in both Claire's and Barry's scenarios.
All you need to do is destroy them to add them to your collection, which can be achieved by shooting, exploding or smashing with a melee weapon.
The gimmick boxes are large ornate chests with a beautifully designed lock.
These boxes can only be opened by persons with small hands, therefore only Natalia is capable of opening them. To open one, you must solve a hot-and-cold style puzzle to disable the box's one or more locks.
The drawings of Franz Kafka are drawn on various walls throughout the island.
They are initially hidden, and can only be found using Moira's flashlight. When you come across one, you can add it to your collection by shining the flashlight directly over it for a few seconds.
A large strange bug in its larvae form. You find these strange creatures hidden in corners and crevices throughout the island.
The larvae can only be seen by Natalia, and they appear to her as a small red haze. To "acquire" one, you must destroy it by throwing a brick at it.
Detention Center Map
A map for the detention centre that you explore at the beginning of Episode One.
A map of the forest area you explore during Episode One.
Fishing Village Map
A map of the fishing village you explore at the beginning of Episode Two.
A map of the old town area you explore during Episode Two.
Food Processing Plant Map
A map of the food processing plant you explore at the beginning of Episode Three.
A map of the sewer system you explore during Episode Three.
Sewage Treatment Plant Map
A map of the sewage treatment plant you explore during Episode Three.
A map of the quarry you explore during Episode Four.
A map of the mines you explore during Episode Four.
Underground Research Facility Map
A map of the underground research facility you explore during Episode Four.