Switch, Dead Cells, full game, not include DLC.
Free Trial for Nintendo Switch Online Member @ JP or HK eshop. If you are a member, simply change your account region to Japan or Hong Kong via website, you can download the game and play it for a week. Offer ends 1st of March. There are also 30% off at these eshops if you decide to buy, or wait for the AU eshop deal.
Update: One of the DLC is free in non-Japan eshop, download game from JP eshop then switch to AU and download the DLC. I reckon the save file from JP eshop can be used for AU eshop. While the HK's save can only be used in Hong Kong's eshop.