QR Code in the gallery that redirects to a game called "CIEMRA" (Darkness in Belarusian), I've analyzed the diary entries and it's a expansion of the MC's condition. Next to the Entry XX is the Code to access the diary. There are interesting images in the diary entries, I recommend you check it out yourself. This is all of the game had:
Entry 0 D68DCFA
Entry 1 DK6S959
Entry 2 AHA9521
Entry 3 8D90SDA
Entry 4 ZAKKIA4
Entry 5 ZKIADID
Entry 6 O682MA6
Entry 7 AL56NE6
Entry 8 AWY9455
Entry 9 EYS5656
Entry 10 SLP9851
Entry 11 M385HAA
Entry 12 L3VEVVV
Entry 13 OKDOJP6
Entry 14 WH00155
Entry 15 236HB45
Entry 16 OUTS56D
Entry 17 995ONL1
Entry 18 CUT1025
Entry 19 NONO111
Entry 20 HTHT881
Entry 21 TO898BE
Entry 22 OOOOH11
Entry 23 989898J
Entry 24 LV9854L
Entry 25 AAA8977
Entry 26 7H77929
Entry 27 CDF95AA
Entry 28 020UHDS
Entry 29 AH51SPA
Entry 30 HAH4444
Entry 31 H22LLLL
Entry 32 OCL9856
Entry 33 DR67KKK
Entry 34 HIDH555
Entry 35 KKSS999
Entry 36 DRW9772
Entry 37 STRS886
Entry 38 IDJ8464
Entry 39 ODJ4546
Entry 40 ISUH895
Entry 41 WHO2314
Entry 42 LIG57TN
Entry 43 THI6234
Entry 44 PL566C6
Entry 45 FE94231
Entry 46 ASI4458
Entry 47 MIIF987
Entry 48 ME97MA8
Entry 0 OOOPSIE (This is the "entry not found" error diary entry)