The Game Boy Advance got some heavy ammunition today. SNK NeoGeo has shipped Metal Slug Advance for Nintendo's handheld, the first title for the GBA from the US branch of the publisher. This portable version of the side-scrollin', heavy gunnin' franchise features five missions across various backdrops and offers enough firepower to level a small country. New to the GBA version are 100 various E-cards that are used as either power-ups or "keys" to unlock additional areas of the game. Metal Slug Advance is rated "T" for Teen and carries an MSRP of $29.99.