Ok, giving it another shot:
1 Delaware - Knights of the Old Republic II [2003-2004]
2 Pennsylvania - Neverwinter Nights II [2004-2006]
3 New Jersey - Dwarves [2005-2007?]
4 Georgia - Alpha Protocol [2006-2010]
5 Connecticut - Aliens: Crucible [2006-2009]
6 Massachusetts - Mask of the Betrayer [2006-2007]
7 Maryland - Dungeon Siege III [2007?-2011]
8 South Carolina - Storm of Zehir [2007-2008]
9 New Hampshire - Fallout: New Vegas [2009-2010]
10 Virginia - XBLA Action RPG [2009-2011]
11 New York - South Park: The Stick of Truth [2009-2014]
12 North Carolina - Stormlands* [2010-2012]
13 Rhode Island - Backspace [2010-?]
14 Vermont - Prey 2 [2011]
15 Kentucky - [???-???]
16 Tennessee - MCA's Project? [???] (Just a heavily implied/rumoured new IP, could be something else)
17 Ohio - Armored Warfare [2012-2016]
18 Louisiana - Second crowdfunded project?* [2013/14-???]
19 Indiana - Brian Heins'/Stormlands Reloaded? [2014-???] (This one puzzled me. If this is not Louisiana, what is?)
20 Mississippi - Pathfinder Card Game [2014-2016?]
*Found this in an interview with Feargus:
This was in 2014. This might have been the rumored MCA project, but I think it's Project Louisiana and they just changed the schedule because of Fig, the PoE release, etc.
Psychonauts 2's campaign ends on January 12, I think Obsidian's project may come right after that.
PoE II probably doesn't exist yet, should enter pre-production right after they're done with the expansion. There's also the chance it'll get a different name like Trenton (perhaps another battle from the revolutionary war?).