1 have tested my updated GDI (Gamebook difficulty index) system with a couple of gamebooks and have successfully calculated an (interim) GDI for each book.
The two books tested were:
- Creature of Havoc (A fighting fantasy gamebook); and
- Invitation to a Feast (My first gamebook).
I redid the score for Invitation to a Feast as the first score was calculated using the older (flawed) system.
As Creature of Havoc is a well-known gamebook in the Fighting Fantasy series (and is well-known as one of the toughest), I will give the final score calculated, including where the adventure ended each time I read the book, using the GDI system (spoilers ahead).
CREATURE OF HAVOC
1) Lost - Creature controlled
2) Lost - Fell off steps into the Bilgewater
3) Lost - Fell off bridge into the Bilgewater
4) Lost - Fell off steps and crashed into boulder by the Bilgewater
5) Lost - Pushed mine truck over a cliff and into the Bilgewater
6) & 7) Lost - Defeated by Darramouss
8) Lost - Captured in Yellowstone mines
9) Lost - Defeated by Chaos Warriors
10) Lost - Mud Slime
11) & 12) & 13) Lost - Couldn't open metal door (Final exit from dungeon)
14) Lost - Captured by Galleykeep (Tree noose trap)
15) Lost - Defeated by moving trees (Forest of Spiders)
16) Lost - Furnace Trap
17) Lost - Dree: Ambushed in alley
18) Lost - Sunk in muddy swamp
19) & 20) Lost - Captured by old woman in Dree
21) Lost - Pushed into muddy swamp by Toadman
22) Lost - Defeated by Hobgoblins (Galleykeep)
23) Lost - Enslaved by Red Cloak
24) Lost - Defeated by Quimmel Bone (Surgery)
25) & 26) Lost - Defeated by Zombie
27) Lost - Defeated by Hobgoblins (Galleykeep)
28) Lost - Joined Zharradan Marr
EXPLORATION SCORE = 29
1) Lost - Defeated by Dark Elf bowman
2) Lost - Defeated by Warrior & Thief
3) Lost - Defeated by Dark Elf bowmen
GAMEPLAY SCORE = 4
(INTERIM) GDI = 29 + 4 = 33
Recapping my explanation of the interim GDI and final GDI (from a previous post):
Finally, to wrap things up, I made a comment earlier that this score is what I classify as an interim score. The reason being is that I could just as easily test the book again and come up with a different score. What I plan to do is to indeed, test the book again, calculate the GDI and then calculate the average GDI based on the two tests. I will continue to do this until the average GDI varies by less than 1 point between tests. I will then conclude the test and consider the GDI as the final GDI.
Looking at the breakup of this score, what it does show is that Creature of Havoc's famed high degree of difficulty lies almost solely with how well hidden the successful path is. Once the correct path is found, Creature of Havoc is actually a very simple book to complete.
Comparing this to Invitation to a Feast, I came up with the following score: (warning - spoilers ahead)
INVITATION TO A FEAST
1) Lost - Deceived by otter
2) Lost - Invite snatched by Walter Weasel at Noble Items stall
3) Lost - Couldn't open Noble Ranger's gate
4) Lost - Invite snatched by Walter Weasel at Noble Items stall
EXPLORATION SCORE = 5
1) Lost - Invite snatched by Walter Weasel at Noble Items stall
GAMEPLAY SCORE = 2
(INTERIM) GDI = 5 + 2 = 7
I am currently calculating the GDI for my second gamebook, The Wounded Falcon. At this stage, I am content with how the GDI system works and probably won't make any major changes to it now.