A personal approach to classics, Gotcha Gothic was created to have an extended option for headings, with lowercases, accents and iconography, not necessarily for web. Optical adjustments and graphic effects were reduced to minimum for a block, bold appearance (more of an Impact than a Franklin).
The 3D version should be used together with the Italic, to cover potential overlap of letters and keep a true effect. 3D with a wide kerning may not need the Italic though.
The Stamp Basic has a reduced amount of characters just to keep a smaller file size, the extended version has all the glyphs the Regular has, but it gets to an excessively large size for a font.