Alternatively, if you're writing a general article or blog post, you could use:

A is the best way to experience arcade history the way developers intended – neck craned slightly, screen tall and proud, eyes darting up and down. Whether you're building a $50 handheld "micro vertical cab" or a full-sized replica of Donkey Kong , curating a dedicated vertical collection transforms the experience.

A is a compressed collection of arcade game files (ROMs) that are specifically filtered and configured to run on a vertically oriented display. Unlike a "Full Non-Merged MAME Set" (which includes thousands of horizontal, driving, light-gun, and mahjong games), a vertical pack focuses only on games where the native screen orientation is taller than it is wide.