Ah...missed Tyo's reply to that thread. Thanks, Trigeminal.
The reason Vampire Lord gets a Catapultasaurus Achievement is because he has a unique way of resurrecting the corpses of fallen spawned creeps as his vampire minions. So he gets an achievement for raising enough zombie catsaurs. I don't think this will apply to any other generals.
I'm going to have to agree and respectfully disagree with you. It looks like the VampireLord achievement for catapultasauruses is unique. However, after looking over the achievement, though they may know be outdated and useless for the upcoming beta 2 build, all of the general demigods have similar achievements. For example:
# ----------------
# Oak Achievements
# ----------------
Name = Oak's Army of the Dead
Description = Build 200 units in a single game.
Name = Soul Keeper
Description = Gain 200 spirits in a single game.
# ------------------
# Sedna Achievements
# ------------------
Name = Sedna's Acolytes
Description = Build 200 units in a single game.
Name = Ready the Yetis!
Description = Gain 10 yetis in a single game.
# ----------------------------
# Queen of Thorns Achievements
# ----------------------------
Name = Queen of Thorns' Court
Description = Build 200 units in a single game.
Name = Endless Ents
Description = Gain 40 ents in a single game.
# -------------------------
# Vampire Lord Achievements
# -------------------------
Name = Vampire Lord's Brood
Description = Build 200 units in a single game.
Name = King of the Suckers
Description = Gain 250 vampires in a single game.
# -------------------
# Oculus Achievements
# -------------------
Name = Oculus' Bench Warmers
Description = Build 200 units in a single game.
Name = Eye of the Beholder
Description = Gain 40 eyes in a single game.
200 units in a single game, may be more than they want now, but that would be awesome. Obviously all 200 would not be recruited at once, but all I can say is this is amazingly hopeful stuff here. Again it is off the old build, but it definately is good "fact" that we can look at.