*Metal Slug* is a side-scrolling action shooter game, with its first installment released in 1996 for arcades by Nazca. The game is renowned for its humorous storyline and detailed graphics, featuring memorable scenes such as the intense battle against Hitler, slashing through enemies (including those symbolizing Japanese soldiers), and fighting aliens, all of which have become classics in players' minds. Of course, its high difficulty level and the demand for precise micro-manipulations also make it unforgettable. After Nazca was acquired by SNK in 1997, *Metal Slug* became part of the SNK family. Over the years, more than ten sequels have been released, with ports available on almost every gaming platform. Additionally, countless fan-made or inspired versions of *Metal Slug* have emerged in Flash format. Here, we will introduce some of the best among them as a tribute to this classic!