I've seen some things... is an achievement in the Call of Duty: Black Ops III Zombies Chronicles remake of Kino der Toten. It requires the player to visit every location the teleporter can take the player to.
To do this, the player must link the core teleporter to the teleporter in the spawn room before they can access the Projection room, where the Pack-a-Punch Machine is located. After spending a total of thirty seconds within the Projection room, the player will be teleported to one of the four rooms or immediately back to spawn.
Repeat this process until the player has visited the "Five" room, the room with the dentist chair and both versions of Samantha's bedroom. After the fourth and final room has been viewed, the achievement will unlock.
- The name of this achievement is a possible reference to a quote of Richtofen from Der Eisendrache: "I've seen things you wouldn't believe. Things.. you couldn't even imagine." The quote appears both in the character discussion as well as the director cut for the map.