I haven't tried it myself, but when I was considering trying Spelunky 2 co-op I ran into this thread which suggests which version of the game works best in co-o

I haven't tried it myself, but when I was considering trying Spelunky 2 co-op I ran into this thread which suggests which version of the game works best in co-op and how to make Steam download it https://steamcommunity.com/app/418530/discussions/3/3801651941327528270/ https://steamcommunity.com/app/418530/discussions/3/38016519... I assume you could look up the manifests in steamdb and manually rollback in any game? Monster Hunter Rise at least shows what I think are past versions https://steamdb.info/depot/1446781/manifests/ https://steamdb.info/depot/1446781/manifests/ That said, presumably the older version is covered by the older DRM which may cease to work.