Prior to 1.14, Diablo II relied heavily on legacy code dating back to its 2000 release. The game utilized a 16-bit installer and ran into significant performance bottlenecks (glitches, palette errors, and crashes) on Windows 7, 8, and 10. The 1.14 patch series (1.14a through 1.14d) marked the first major engineering effort on the title in nearly a decade, preceding the release of Diablo II: Resurrected by five years.

Efficient run loops:

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