Salamander Enhanced for MSX2/2+.
This version of the Konami game, originally an MSX1 game without smooth scrolling, was upgraded via a community patch (by a team that includes Victor Martinez, Toni Gálvez, FRS and others), to feature smooth scrolling, bug fixes, voice samples and new color palettes.
The original arcade celebrated its 40th anniversary last weekend. The MSX version has many changes, like a normal Gradius style weapon selector, and many secrets and extras.