Cipher 2.0.2.1. (S.T.A.L.K.E.R. 2)

In General, as the representative of GSK, the date 2.0.2.1. it's a cipher.
I have a question, does anyone remember something to do with this figure?
MB 1202 or something like that.
And another thing, the release date of Stalker:

- Shadow of Chernobyl - 20 Mar 2007
- Clear sky - August 22, 2008
- Call of Pripyat - October 2, 2009
- Stalker 2 - out planned in 2012

Have any ideas, guesses about this?