Originally Posted by
Freya
1.5 is the HD remaster, It has 1 and Chains and the Cutscene for 358/2.
2.5 is another HD remaster, it is KHII, Birth by sleep, and cutsenes of Coded.
2.8 is Dream drop and A new Birth chapter.
They just consolidated all the games and put them on three games instead of all over the place.
So play most everything on 1.5 (KH1 and Chains) Then start 2.5 (KH2) then go back and watch the cutsense story for 358/2. Then go BACK to 2.5 and finish it (Birth and Coded.)
Or you can just do all of 1.5 and then all of 2.5. It's not that bad if you watch 358/2 but it'd make more sense after 2.
2.8 is going to have Dream Drop Distance and a new chapter of Birth by sleep. OR you can just go play Dream drop on the 3DS if you finish all that before 2.8 comes out.