Trials Games
Currently, there are 13 games in the Trails series, and this is the sequential order to play them:
Trails in the Sky
Trails in the Sky SC
Trails in the Sky the 3rd
Trails from Zero
Trails to Azure
Trails of Cold Steel
Trails of Cold Steel II
Trails of Cold Steel III
Trails of Cold Steel IV
Trails into Reverie
Trails Through Daybreak
Trails Through Daybreak 2
Trails Beyond the Horizon