Title ideas for a fantasy crossover?

I would like to write a crossover fanfiction and I have it all planned perfectly, but I can't quite figure out an official name.
I plan to make sequels to it, so it'll be something similar to:
[Original] (Title)
[Sequel] (Title): Ancient Darkness
[Sequel] (Title): Tides of War

I can only come up with titles that is more than one word, but I want a title that'll be one word similar to "Warcraft", "Okami", or even "Minecraft"
Can I get any ideas that can jumpstart my lame titles into good ones?

Warhammer?