The Elder Scrolls V: Skyrim

Bethesda Game Studios · 2011

37.1 km²

Cited sources

en.uesp.net — 37.1 km² (UESP — the canonical Elder Scrolls wiki; community measurements of the in-game worldspace converge on ~37.1 km² (14.3 sq mi).)
hub.sivo.it.com — 37.1 km² (Independent write-up walking through how the 37.1 km² figure is derived from in-game cell math.)

See The Elder Scrolls V: Skyrim dragged across a real-world map and watch its Mercator-distorted size change while the true 37.1 km² stays fixed.