How to play Gunvalkyrie on Mac

Gunvalkyrie is an alternate history/science fiction video game developed by Smilebit and published by Sega for the Microsoft Xbox. Originally developed for the Sega Dreamcast, it's visual style was very similar to the final Xbox version. The Dreamcast version's distinguishing feature was that during the game's development, GunValkyrie utilized a unique control scheme using both a light gun and a controller. This control scheme was dropped when development shifted to the Xbox version. The gameplay is very different from most third-person shooters, due to a unique dual analog control scheme, which is the main contributor to the steep learning curve of the game. Players travel to various worlds investigating the disappearance of several colonies, with only giant mutated insect creatures left behind. These insects comprise the bulk of the enemies you face along the way. Players control Kelly or Saburouta with both analog sticks, the left controlling forward/backward movement and turning, while the right aims their weapons, and when clicked, allows quick-turns. Clicking in the left stick while pointing in a direction causes the character to boost. The left trigger is a boost/jump, and when combined with the left analog boost, can be strung together into combos to keep the player off the ground entirely, which is a necessity for some levels. Face buttons are used to select weapons, and the right trigger fires the selected weapon. The game comprises ten levels, the story unfolding via text between levels, or the occasional in-game cutscene. At the beginning of most levels, excluding boss battles, you have the choice of picking either Kelly or Saburouta. Kelly's primary weapon is fast but weaker, and she's overall faster and more maneuverable. Saburouta is slower, has more limited maneuverability in the air, and carries a stronger primary weapon, the Matchlock Cannon. Basically the two characters make up the two difficulty settings, with Kelly being the "Normal", and Sa