TERROR AUSTRALIS includes three roleplaying adventures, "Old Fellow that Bunyip," "Pride of Yirrimburra," and "City Beneath the Sands"
As well as extensive information about the Aboriginal inhabitants, their mystical concept of Dreamtime, inhabitants of the Dreamtime, Australian history, transportation in the 1920's, contemporary Australian slang, famous hauntings, and a special chapter analyzing the Dreamtime (Alcheringa) in roleplaying terms.
Intended as a roleplaying supplement and useful in for any roleplaying game, TERROR AUSTRALIS also contains many pages of illustrations and maps to intrigue any Australia buff.
There are two "new" scenarios, with a third being the Australian chapter of Masks of Nyarlathotep
Terror Australis has lots of helpful stuff about:
The Australian Aboriginals
The Aboriginal Dreamtime, including a Dreamtime bestiary
Unique mythological creatures and Megafauna
Australian Slang
It contains a very light treatment of:
The physical geography of the Australian Continent