I love these games because of the storyline, it actually makes you fell like your part of the history and lore. Every mission you take impacts the story deeper and unfold different events in the mechwarrior universe.
The only examples could think of making huge impacts were the Mechwarrior 4 series.
Mechwarrior 4 Vengance-You get vengeance on your family's murders, later on you have to save your sister or go for the armory for the ending.
Mechwarrior 4 Black Knight-If you help the KFA they become your allies, if you don't help them they become your enemies.
Mechwarrior 4 Mercenaries-Getting blacklisted by the Lyrans or FedSuns based on your missions.You can dedicate victories to Steiner or Davion as you work for them. Infamy and Nobility morales can determine what missions you can take .Different Mercenaries(specifically The Kell Hounds and Grey Death Legion) have different dialogue about Davion and Steiner throughout missions.
Edited by Will9761, 04 July 2012 - 08:32 AM.