With the Secret Missions livestream in the news multiple times over the past week week, it's easy for minds to focus on that game's 25th anniversary. But it's December, and SM1 isn't the only Wing Commander celebrating a birthday! Wing Commander 3 turned 21 on Tuesday, and Special Operations 1 turns 24 this coming Monday. But today we're focusing on the Vision Engine which debuted with Wing Commander Prophecy 18 years ago yesterday. Time and Wingnuts have been kind to the franchise, however, an…