Handheld support and controller support differ
The official FAQ confirms full controller support for the game. That does not establish that the Steam Deck runs it successfully or meets a specific frame-rate target. The separate handheld answer remains exploratory in the recorded source.
No SteamOS or Proton test was collected for this page. A working Proton version, controller layout on the device and handheld-specific issues remain pending confirmation（待确认）. There is no verified basis here to label the game Verified, Playable or Unsupported on Steam Deck.
Graphics options are confirmed for the game
The FAQ confirms graphics presets and individual options. For poor performance, it recommends lowering the preset first and then changing individual settings. Those are general PC recommendations rather than a tested Steam Deck configuration.
No device-specific resolution, battery duration or measured frame rate is available in the source material. Do not treat an invented settings table as a recorded benchmark. Steam Deck performance and the best profile remain pending confirmation（待确认）.
What the source says about saves
Nivalis Nights supports Steam Cloud and synchronizes saves between PCs when online. The official FAQ says offline play is possible, and saves synchronize after reconnecting. These game-level features do not themselves prove correct synchronization or launch behavior on an untested handheld setup.
The game also allows manual saving from the Pause Menu and autosaves at the end of each day. The publisher recommends a manual save before leaving a session. A Steam Deck-specific save-location or recovery guide remains pending confirmation（待确认）.
Separate cloud streaming from native play
The official FAQ confirms GeForce NOW availability. That is a streaming statement, not evidence of native Steam Deck compatibility. A tested streaming setup on the device was not collected and remains pending confirmation（待确认）.
Sources and date
This page uses the official publisher FAQ captured on October 1, 2026. The Steam store is the previously verified game listing. These are historical research sources, so this page does not claim a new check of later updates.