Syder Arcade is a shooting-game in the style of a really classical vertical shooter, developed by Studio Evil. The game does not only have a clean gameplay, but also very polished graphics. This is how classical shooting games from the Amiga-times would look like today. As a special feature, the game offers some “graphic filter”, that lets you select very strange in-game color-schemes. You can select for example, to play the game in color-schemes “Apple II, C64, Amiga HAM or gray2bit“. And since there is a decent lack of good shooting-games on Mac OS-X, consider this a gaming suggestion! (The game is also available for Windows)
(via)