Re: System Designations
Basic, Expert, Companion, Master, Immortal.
I.e. one of the earlier forms of D&D, contemorary with AD&D (which then spawned 2e AD&D, which became 3rd edition D&D, which...). The details of which came first and who stole what from whom are not overly relevant.
Largely comparable to AD&D, with much fewer bells and whistles at low levels (Dwarf, Elf and Halfling are classes, only three alignments). A lot more detail on running a kingdom / mage tower / whatever than AD&D provided (this is in E (a bit), C and M (more)). A very weird endgame if you reach level 36 and try for Immortality.
So dungeon crawls up to level 3-4, exploring the world and founding your own barony up to level 14 or so, then you start playing with nations and world shaking events.