Within the first 6 months:
Hire all of the management staff.
Have a complete initial design.
Within the first year:
Have all of the worker staff hired.
within the first 18 months:
Have a working demo of the game.
Within the first 2 years:
Have the product in beta testing.
Within the first 30 months:
Have the product released.
Scale down to a maintenance level of staff.
Start work on new game.
Hire more people.