The X-Wing series spans a total of four games and three expansion packs. Of the series, TIE Fighter is often mentioned in top 100 games lists, and in general the entire series has been commercially and critically well received. But if TIE Fighter was the most popular, why choose X-Wing Alliance? The answer is simple. All of the games in the series are powered by the same engine. X-Wing Alliance is the newest iteration of that engine, and has every feature of the previous games and more.