by eldaec
1,2,0.1 has to be first. The season 1 game 1 twist, and the box 3 reveal are too good not to do that one first.
I like 2 coming after 1, because the last few months of 1 teach you to prioritise story objectives, and if you don't do that in 2 you can really have a bad time.
0 is a bit on rails and has more automatic stabilisers in the campaign than either other game, so if you played 0 before 2, you'd mistakenly think 2 won't let you get too far off track. And you'd be very wrong.
Also the references in 0 to 1 and 2 are too subtle for you to remember them and notice the connection when you play 1 and 2. But they are obvious enough the other way around.