Dept. Heaven games in order

All 7 games of the Dept. Heaven series in the order they came out, from Riviera: The Promised Land (2002) to Gloria Union (2011).

1. 
   Riviera: The Promised LandPC, WonderSwan, GBA +4 · Sting
   9012 Jul
2. 
   Yggdra UnionPC, PSP, GBA +3 · Sting
   23 Mar
3. 
   Yggdra UnisonMobile, DS · Sting
   11 Nov
4. 
   Knights in the NightmareAndroid, DS, PSP +1 · Sting
   8025 Sep
5. 
   Blaze Union: Story to Reach the FutureiOS, Android, PSP +1 · Sting
   27 May
6. 
   GungnirPSP · Sting
   19 May
7. 
   Gloria UnioniOS, Android, PSP +1 · Sting
   23 Jun