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|Publisher: Sega, Milestone|
|System(s): Sega NAOMI, Nintendo Wii|
|Number of players: 1-2|
Illmatic Envelope, commonly abbreviated Illvelo, is a 2008 shoot-'em-up for the Sega NAOMI arcade platform by Milestone. They ported it to the Nintendo Wii later that year as Illvelo Wii (イルベロWii), with Sega partnering in its release.