Half-Life: Alyx now 25% off $63.71 (usually $84.95).
It's a VR game so you will need a compatible headset.
The add on, Half-Life: Alyx - Final Hour, is also on sale for 10% off being $13.05 (usually $14.50)
Cheapest it has been since the last deal which was the same price: https://www.ozbargain.com.au/node/547749
Absolute masterpiece of a game. Such a polished title, the best VR game available at the moment by miles.