apparently sekiro was notably small in filesize, but no idea what would actually be the smallest
― TRANCED INTO RADIOACTIVE PUREE (Will M.), Wednesday, 14 October 2020 20:24 (one year ago) link
there's often limited edition physical media runs of small indie games so Kero Blaster at 20mb is very likely the winner on PS4 https://limitedrungames.com/products/limited-run-130-kero-blaster-ps4
― thomasintrouble, Wednesday, 14 October 2020 21:14 (one year ago) link