In the United States he is best known for his work with writer Brian Azzarello on the Vertigo title 100 Bullets,[2] while in Argentina and Europe he is noted for his collaborations with Ricardo Barreiro and Carlos Trillo.

He is the main creator of the popular Argentine comic convention Crack Bang Boom; a massive event which is held annually in the city of Rosario and is considered as the most important of its type in South America.

Risso was born in Leones in Córdoba Province, Argentina, and started as a cartoonist in 1981, drawing his first collaborations for the morning newspaper La Nación and the magazines Eroticón and Satiricón, all published by Editorial Columba.

In 2010 he created the Argentine event Crack Bang Boom, a comics/Argentine comics, cartoon, cosplay, fantasy and science-fiction convention, which is annually held in the city of Rosario.

Hosted and organized by Risso with a group of collaborators and with support from the Municipality of Rosario, Crack Bang Boom has become the most famous convention of its type in Argentina, as well as one of the most important events for the comics world in South America.