-Modded minecraft, probably the most amazing game ever created, and then perfected by mods. Needs a proper control scheme in steam to play on the deck. Playable through prism launcher on the discover app repository.

-Stardew Valley, a really good farming simulator/rouge lite, also one of the best games ever made. Great on the deck.

-Modded fallout 4 is probably the funnest action RPG I have ever played. The base game is pretty decent. Plays great on the deck.

-Nova Aetus mod for mount and blade warband. One of my favorite games of all time, with this amazing mod. Too much to explain. Needs a proper control scheme on deck, or a mouse and keyboard.

-Rimworld, dark colony sim meets tower defense and hardcore futuristic scifi world building that is great. A bit cumbersome on the deck because of the mouse heavy interface.

-Borderlands 2, a great little grindy shoot and loot. Fun co-op game. Great on deck.

For minecraft modpacks, i recommend the 1.7.10 pack on technic, for 1.7 and ATM 8 from curseforge for 1.9.

I dont know if this is why, but I think Australia has some weird spook laws, and random regulations, which makes it difficult for value to release their stuff there. It might also be because of a tax that would make the device expensive. You should look it up.