This might be interesting to some people: in the 100line script files I found online a while back, each route has a codename to denote it:
(Note: I assume "r" or "rt" at the end is supposed to denote the word "route")
Goodbye Eito: aotukino (probably meant to be "Aotsuki no"?)
Rebellion: dokusair (dokusai = "dictatorship" according to a JP dictionary)
Eva: ivachanr (Eva-chan… "iva" is her code in the files)
Multiple Eitos: ninshiki (which might be "cognition" ???)
Serial Battles: jigokurt (jigoku = "hell")
Casual: mattarir (mattari = "laid-back (lifestyle)")
before the Box of Blessings/Calamity split: boknoclt (seems to be a shortened version of "bouken occult")
Box of Blessings: boukenrt (bouken = "adventure")
Box of Calamity: occultrt
Cult of Takumi: yakusitk (shortened version of Takemaru's last name + tk = Taku?)
V'ehxness: kawanatk (Tsubasa's last name + tk = Taku?)
Coming of Age: seisyunr (seisyun = seishun = "adolescence")
before the SF/Romance split: sftolove
early kill Eito routes: spcmdesu (I don't know what this means - EDIT: it's two letters each of "splatter" "comedy" "deathgame" and "suiri")
before the Slasher/Comedy split: splacome (shortened version of "splatter comedy")
before the Killing Game/Mystery split: deathsui (shortened combination of death game + mystery)
Killing Game: deathgam ("deathgame" was slightly too long it seems)
Mystery: suirixrt (suiri = "mystery genre")