Survivor is infected corpse poison after coming out from tomb, need is in tomb vice general corpse poison purify, be informed by chance there is a tomb trace inside mountain area abandoned funeral home, go looking for detoxification method, the result discovered more horrible scene...

整合了洞穴之旅前传到第四部的内容，建图指令：cave_mix_m[x] 我的steam工坊空间不足，请到gamemaps网站下载游玩。 Integrating all the maps of the cave,map codes: cave_mix_m[x] There is not enough space in my Steam workshop, please go to gamemaps website to download and play.