This is a linear calculation, however if we add
crunch time in the equation where people work more hours at the end of a project so they will produce a bit more, we can assume that the game has reached if not 100% (completed) then at least something above at least 98%.
EDIT: i recalculated assuming the last three months they did a 55h/week cycle with the last 15 days a 75h/week cycle:
Code:
a=60.8/508
b=a*(55.0/40.0)
c=a*(75.0/40.0)
p=698*a + 75*b + 15*c
p is 99.24%
Ok, assuming your calculations are correct (since i based mine on yours) and getting the above with a little grain of salt, then they're extremely close to completion now. If not finished.