Ragnarok games in order

All 5 games of the Ragnarok series in the order they came out, from Ragnarok Online 2: The Gate of the World (2007) to Ragnarok Online 2: Legend of the Second (2012).

1. 
   Ragnarok Online 2: The Gate of the WorldPC · Gravity Corporation
   28 May
2. 
   Ragnarok DSDS · GungHo Online Entertainment
   18 Dec
3. 
   Ragnarok TacticsPSP · GungHo Online Entertainment
   27 Oct
4. 
   Ragnarok OdysseyVita, PS3 · Game Arts
   732 Feb
5. 
   Ragnarok Online 2: Legend of the SecondPC · Gravity Corporation
   26 Mar