Broken Sword did not make it onto my list of fifty games. Rest assured that I have now slapped myself in the face multiple times for this error.
Broken Sword is a game that can claim something very few other games can claim. It is far and away the best entry in the genre ever produced. When it comes to point and click adventures, there is simply none finer. Broken Sword is not only the most played P&C adventure of all time, it is also the best. Sure; Diskworld Noir and Monkey Island both have a following based chiefly on their sense of humor, but when judged from a gameplay, story or graphical perspective they simply cannot compete with the Shadow of the Templars. There is a reason that the game is constantly reproduced for more modern consoles. This gem from 1996 has been repackaged for the PC, Mac, DS and Wii, and has required very little updating. Off the top of my head I struggle to think of a game that has aged more gracefully than the original Broken Sword.
Broken Sword is one of those games who's production values have stood the test of time. The cell shaded characters moving over tirelessly hand drawn backgrounds hold up as well today as they ever did. Similarly the voice acting (Broken Sword was one of the first games to make use of a full vocal cast) was of tremendous quality for a game of it's time.
As for the story, let my preface by saying this. Broken Sword is a conspiracy murder mystery. In the modern age roughly 75% of all entries into this genre make use of the Knights of the Temple. Broken Sword was doing it before it was cool.
Broken Sword is one of the few games I have ever played that can come close to being able to stand up on their story alone. The cast of characters are all deep, well rounded and likable. The narrative is varied and intriguing and the dialog is an example of some of the best writing that I remember seeing in a video game. Adventure games of the modern era tend to be so horribly written that I end up turning away in disgust (I'm looking at you Heavy Rain), in contrast Broken Sword has generated multiple playthorugh from me, just so that I can explore every corner of the game's story.
As for legacy, aside from standing the test of time in a way no other game on this list has done, Broken Sword single-handedly saved a gaming genre. Before Shadow of the Templars the era of point and click games had come to a complete halt. Lucas Arts (the main producers) had given up in favor of producing endless Starwars clones, Monkey Island has been abandoned and it looked like P&C adventures would never rise again.
It is directly because of the critical and commercial success of Broken Sword that classic games like The Curse of Monkey Island (oft considered the best in the series), Syberia and Culpa Inerta were ever made. What Final Fantasy VII did for the JRPG genre, Broken Sword did for adventure game. Are there any other games on this list that can lay claim to something like that? Well fair cop, there's Doom, but Doom's legacy is phenomenally overrated.
Vote Broken Sword.