King's Bounty: The Legend

Hor+ up to 16:10, pillarboxed based on 16:10 for wider aspect ratios.
In 16:9 and wider ARs, the pillarboxing may not hide all 2D elements, in both combat and free-roaming.
So things such as the dialog icon or health bar of a unit that's hidden by the pillarboxing may be visible.
No HUD/UI stretch. Despite the ubiquitous 2D, the devs managed to design a game that looks "natural" in most formats, widescreen or not. There are two models of the main hero/army bar specific to "narrow-" and widescreen. Other HUD elements scale properly (as seen on "battle screen" shots).
In non-widescreen, the baseline for fullscreen 2D is 5:4, i.e 4:3 is Vert- (although 4:3 to 5:4 is Hor+ in 3D). Widescreen reveals the whole 16:10 canvas of the background image.
The character sheet, spell book, quest log, fullscreen map and dialog interface all scale properly over the Hor+ background.
The main menu's interface is Hor+, while the background image (a 5:4 picture) is Vert- in widescreen resolutions (and pillarboxed beyond 16:10).
The intro/trailer is a 4:3 (800x600) video that gets pillarboxed in widescreen.
The intro/trailer is a 4:3 (800x600) video that gets pillarboxed in widescreen.
The introductory story screens are Hor+ (4:3 is Vert- to 5:4, 16:9 is pillarboxed 16:10).
Actual cut scenes are rendered in real-time 3D using the game's engine and are Hor+ (pillarboxed in 16:9).