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Your search for What platform did Baldi's Basics Windows XP Edition released on returned the following results:

GDI+ 1.0

Windows XP debuted with GDI+ 1.0, the successor to the GDI (Graphics Device Interface) graphics subsystem used by previous Windows versions.

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Graphics Device Interfacegraphics subsystem () used by previous Windows versions

Windows XP debuted with GDI+ 1.0, the successor to the GDI (Graphics Device Interface) graphics subsystem used by previous Windows versions.

Source: