This year I will post 1 hint and leave it up for 24 hours. After 24 hours I will reveal.
#50- Commit genocide against various animals, now in HD!
#49- An impossible to beat game, as the goal is your own. You can start as lowly baron or be an emperor, either way eventually you can certainly see the fruits of your labors.
#48- 10-15 people are introduced from an insane asylum, you must destroy your enemies to further learn about each individual.
#47- Unlike the previous games, this new game series from the same developers was set in Japan and featured deadly musketmen.
#46- The gist of this game is to build better castles than your enemies, because once you had a good economy and castle going, you can easily fend off any attack and build up for a devastating attack yourself.
#45- The first game I played on XBL, it featured online battles in urban settings, and one fun thing to do would be to destroy a building next to an enemy and the building would kill your enemy. Unlike the Halo series it did not receive many sequels.
#49: Crusader Kings?