Valve has officially verified Sisterly Lust for Steam Deck!
The latest update of the game offers better Steam Deck support. Unfortunately keyboard input is a little finicky in the game's engine, so I had to disable save game naming. Naming the MC and his mother and sisters is still possible on the Steam Deck.
Changelog
v1.1.9
- Better save game naming on Steam Deck
v1.1.8
- Better Steam Deck support