ok, fine, doom 2 long trek back home is a immediate sequel to doom 2, where you backtrack doom 2's levels, where the previous's level exit is now the entrance
each map is now changed and map01 is icon of sin while map30 is entryway
it's basically backtracking doom 2, but the levels are redesigned in a way
imagine that but with doom 1, where episode 1 is hell where e1m1 is dis, and e1m8 is hell keep
the final episode would be knee deep in the dead, e3m1 would be phobos anomolie, and e3m8 is hangar