My Gamerscore Plan and Gears 2 6x XP

So I've been making this Gamerscore system in a spreadsheet which will allow me to increase my completion percentage and also let me play new games. It took a while to make and it's main purpose though was to provide an accurate representation of what I consider completion percentage. This means that I removed all glitched achievements and achievements worth 0 points so that they didn't affect the percentage. I never understood why the big sites such as TrueAchievements didn't do this, at least with glitched achievements it makes it inaccurate.

As for playing new games, that's much more complicated:

So X is the achievements I have gained since I started the system. So if I have gained 100 achievements since starting this system then X will be 100.

Next the achievements gained are divided by a number which is determined depending on the completion percentage I have.

For 10% or less:

X / 4

100 / 4 = 25

For 20% or less:

X / 3.5

100 / 3.5 = 28.57

For 25% or less:

X / 3.25

100 / 3.25 = 30.76

For 30% or less:

X / 3

100 / 3 = 33.33

For 40% or less:

X / 2.75

100 / 2.75 = 36.36

For 50% or less:

X / 2.5

100 / 2.5 = 40

For 60% or less:

X / 2.25

100 / 2.25 = 44.44

For 70% or less:

X / 2

100 / 2 = 50

For 75% or less:

X / 1.75

100 / 1.75 = 57.14

For 80% or less:

X / 1.5

100 / 1.5 = 66.66

For 90% or less:

X / 1.25

100 / 1.25 = 80

For 95% or less:

X / 1

100 / 1 = 100

For 100% or less:

X / 0.5

100 / 0.5 = 200

The number gained after the division means that I can start a game with that many achievements. So if I have 60% or less and have gained 100 achievements during the system then I can start a game with 44 achievements or less. Once the new game has been entered into the spreadsheet the achievements of that game are subtracted. So If I start an Arcade game with 12 achievements then I have enough achievements left over to start a game with 32 or less achievements. Or 32.44 to be accurate.

I've probably completely confused you if you read the whole thing, but this system works and is letting me get a higher completion whilst starting new games.

Here's the file if anyone's interested:

http://rapidshare.com/files/398956486/GS_Completion.xlsx.html

Also, I'll be playing Gears 2 a lot this week as it's 6x XP. If you're interested in joining me or have your own session add, message or invite me.

Thanks for reading, bye :)