https://steamproxy.net/steamstore/app/2221920/Immortals_Fenyx_Rising/
You must have Immortals Fenyx Rising Bought and Installed on Steam to proceed with this Guide. It goes on sale for dirt cheap alot so i suggest getting it that way

Any DLC you purchase from the Steam Store will still work. Including the Gold Edition

(For Steam Deck / Linux)
Find Immortals Fenyx Rising in your Library on Steam and press Start or the Settings Cog and head to Developer and Press A on Clear Proton Files. (This will Wipe the Ubisoft Connect installation)

Download this Fix via Google Drive: https://drive.google.com/file/d/1Rfv2sP4VNDc8mais54I7orR4E8k1895_/view
This Link Contains a Download, Only proceed if you know what you are doing.
(On Steam Deck Switch to Desktop Mode to follow this step)

Once you have it Downloaded, Extract it, Go to Steam - Right Click on Immortals Fenyx Rising in your Library - Manage - Browse Local Files. Move all files from the "FenyxRisingFix" into the Fenyx Rising Install Directory and replace all when prompted

(On Steam Deck Switch back into Gaming Mode)
Find Immortals Fenyx Rising in your Steam Library, And Press Play. Immortals Fenyx Rising should load right away. And There you have it! You can now play Immortals Fenyx Rising without Ubisoft Connect For as long as you want, Offline for as long as you want without having to Connect to the Internet.

I highly recommend this for Steam Deck users especially because Ubisoft Connect tends to Break Alot with Updates and sometimes it just won’t work Offline

It feels like a perfect experience on Steam Deck when applying this

To increase Text Size to go Options -> Language -> Set Subtitle Size to Larger

If you are running into issues accessing DLC, Season Pass or Gold Edition Content try disabling the Ubisoft Activation DLC's in of the game Properties in Steam
(If you do not have a respective DLC there will be a golden haze around its icon)

To fix players frustration with Uplay, To try and silence Off-Topic Reviews and Discussions that only complain about Uplay, and to the people who refuse to buy this game because of Uplay.

I just want everyone to be able to enjoy Video Games without complaining over every little thing, It's an annoying thing that many take their games too seriously, Some miss out on gems like these because of flaws not related to the actual games themselves.

Please, Enjoy the game.

Save Files are Located in the Install Directory in SAVE_GAMES. If you apply this Fix to Another Device you can transfer the Saves easily this way

The Original Save File should be in Program Files x86/Ubisoft/Ubisoft Game Launcher/savegames/userid/5405 or 62326
If you wish to Maintain your old save you can copy the Original Save into SAVE_GAMES as listed above

You can convert your saves Back and Forth from UbiConnect and this Fix using "ACSaveTool"

Estimated: 1.5 - 2 Hours of Battery

Controller Support:

Steam Button - Controller Settings - Edit Layout - Templates - Gamepad with Joystick Trackpad - Press A button Twice to apply

Quick Access Menu Settings:
Use per-game profile: On
Refresh Rate: 40hz / 45hz (45hz is minimum on the OLED)
Allow Tearing: On

Graphical Settings:
Display:
Window Mode: Fullscreen
Aspect Ratio: All
Resolution: 1280x800
VSync: Off
FPS Limit: Off
Field of View: 90

Graphics:
Adaptive Quality: Off
Anti-Aliasing: Medium

Environment Quality: Very High
Shadow Quality: Low
Effects Quality: Low
Texture Quality: Medium

Reflections: Off
Ambient Occlusion: Off

Depth of Field: On
Motion Blur: Off

Press the X Button to Apply, and then Press A to Restart with the Changes

Estimated: 2.5 - 3 Hours of Battery

Controller Support:

Steam Button - Controller Settings - Edit Layout - Templates - Gamepad with Joystick Trackpad - Press A button Twice to apply

Quick Access Menu Settings:
Use per-game profile: On
Refresh Rate: 30fps (60hz) / 30fps (90hz)
Allow Tearing: On

Graphical Settings:
Display:
Window Mode: Fullscreen
Aspect Ratio: All
Resolution: 1280x800
VSync: Off
FPS Limit: Off
Field of View: 90

Graphics:
Adaptive Quality: Off
Anti-Aliasing: Medium

Environment Quality: Very High
Shadow Quality: Medium
Effects Quality: High
Texture Quality: Medium

Reflections: Off
Ambient Occlusion: On

Depth of Field: On
Motion Blur: On

Press the X Button to Apply, and then Press A to Restart with the Changes