Steins;Gate Complete Blu-ray BOX (2018). Includes ep23β which I didn’t see on Nyaa here. Original JP release in 9 volumes with a movie can be found here.
Please seed for as long as possible. There are people just like you who want access to this content.

Video: AVC 1080p
Audio: Japanese LPCM 2.0 (Series), Japanese LPCM 5.1 (Movie)
Subs: None (Series), Japanese & English PGS (Movie)

Steins;Gate (eps 1-24, discs 1-5) - https://myanimelist.net/anime/9253
Steins;Gate: Oukoubakko no Poriomania (ep 25/special, 00002.m2ts in disc 5) - https://myanimelist.net/anime/10863
Steins;Gate: Kyoukaimenjou no Missing Link - Divide By Zero (ep 23β, leading to Steins;Gate 0 story, 00011.m2ts in disc 5) - https://myanimelist.net/anime/32188
Steins;Gate Movie: Fuka Ryouiki no Déjà vu (disc 6) - https://myanimelist.net/anime/11577

Credits to:
sqwt@skyeysnow for uploading the BDBOX there
Prime for inspiration
xCryptic for reuploading BDMVs