Baseline (Widescreen) Solution & Issues
The resolution can be changed at any time from the Options, Graphics menu. The game is in static 16:9 at 16:10.
To remove the black bars at 16:10, use a modified exe. Since March 2024, an older Uplay DLL is also required for the fix to work.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
The game accepts the resolution and only the cutscenes and menus are showed with lateral black bars. The black bars can be removed the same way as for 16:10, documented above.
Eyefinity / Surround Specific Solution & Issues
The game is in static aspect in single screen, but is natively hor+ for multi-monitor. A few playable sequences (QTE in some cutscenes and the intro to each Truth cluster) are pillarboxed. However, unlike in AC2, they are little more than cutscenes: you only have to move forward or click a button, no jumping/climbing involved.
Although resolution support is the same, the MP game is a bit different: framerate is capped at 60 FPS and screen change is static in multi-mon.
4k UHD Specific Solution & Issues