Big thanks to leeroys_dad for having actual details.
The codes will take 40% off the rather steep price.
MELBOURNE40 code is only for Victoria, can be used on any day, expires on 10th June 2019 but you can prebook any date after 10th June 2019.
BRISBANE40 code is only for Queensland, can only be used Friday to Sunday, expires on 10th June 2019 but you can prebook any Friday to Sunday after 10th June 2019.
If you're into VR or zombie shooting or something new, this is great fun. If you're a hardcore gamer that requires max resolution at 120Hz, this isn't ready for you yet.
grrr provided a good description of the experience in a previous deal.
edit: terribly sorry for the rookie error. Thought it worked for Brisbane too, but was wrong.
edit2: added BRISBANE40 code
Any expiry or restrictions?