Second set of hints now.
#30 Valkyria Chronicles 4
-The most recent entry in this series, takes place at the same time as the first game in it, but in a different place and featuring a different cast of characters.
#29 Yakuza 0
-Dragon and the Mad Dog
#28
-You must wait for a day after a rainy day to enter the other world
-You go to the other world to try and solve a string of murders
#27
-The "End of the World" is a literal continent spanning stone wall
-Originally a Japan-only Saturn RPG, later released on the PS1 in the west
#26
-Joining a military school, you become a member of the only class that does not segregate commoners and the nobility
-First of four, or sixth of twelve