Here is the full list of all 11 Welcome to the Game achievements.
Make it to the Red Room.
Beat the game with out getting hacked.
Beat the game with in 7 days.
Visit all active deep web sites.
Solve Claffis on the first try.
Finish the tutorial.
Make it to the Who Am I secret ending.
Make it to the Where Am I secret ending.
Get to master level of the DOS_BLOCKER tool.
Get to master level of the K3RN3LC0MP1L3R tool.
Get to master level of the CloudGrid tool.