Here is the full list of all 10 nanos world Playtest achievements.
Blblblblb! Start the game 137 times
Experience 2^8 Scripting Errors
Rise and Shine! Join servers 66.6 times
At'em ball! Get killed by props for a total of 62 times
That's what I'm talking about! Send 502 chat messages
Get out of the way! Get roamed by vehicles for a total of 47 times
Sentenced to Guantanamo Bay after killing 97 players
Bhavacakra! Reincarnate 76 times to pay off your Karma
Carry Props for a total of 64000 meters
La Creazione di Adamo