So it appears as though a poster collectable is bugged, and 2 more are missing entirely. I was trying to find the last 3 posters for my Steam guide (https://steamcommunity.com/sharedfiles/filedetails/?id=2622177439), and by looking through the game files, here's what I've discovered. 1. The poster at Streatham Common is hidden behind a wall. It activates if you walk next to the wall, but it is not visible at all. 2. There should be a poster at Reigate (tile 34, 30). I cannot find one, and I'm worried it was on the old station building and never added back when the station asset was replaced at the last minute. 3. There should also be a poster at Earlswood (tile 37, 32). Again, I cannot find one for the life of me. It is relatively easy to go out of bounds under the bridge just north of the station and so I looked all over the station area, but could not find it. For clarification, all 3 of these are the museum poster, not the seagull poster. The Gull Up achievement is not achievable without these last 2 posters being accessible. Thank you for your attention.