#Myst
#Civilisation [OG, windows edition]
#MightAndMagic [7-9 specifically, but heroes too and xeen too]
#DwarfFortress
#Umineko
#Minecraft
#AnarchyOnline
Not 100% on this list, mainly anarchy online. was a big formative part of my teen years but i don't play it now.
Rest of them though 100%. Honourable mention to #ThemeParkWorld and #TransportTycoonDeluxe .