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Hero System
Threshold Framework
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HERO System 5e Revised
Equipment Costs Points Debunk
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Bell Curve
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vs d20 Linear
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Skip Navigation LinksHero System>Bell Curve>vs d20 Linear
d20 Linear vs 3d6 Bell Curve
           1d20 3d6
     Pct           Odds           Pct           Odds     
1 5% 19.0 : 1 - -
2 10% 9 : 1 - -
3 15% 5.7 : 1 0.5% 215 : 1
4 20% 4 : 1 1.9% 53 : 1
5 25% 3 : 1 4.6% 20.6 : 1
6 30% 2.3 : 1 9.3% 9.8 : 1
7 35% 1.8 : 1 16.2% 5.2 : 1
8 40% 1.5 : 1 25.9% 2.9 : 1
9 45% 1.2 : 1 37.5% 1.7 : 1
10 50% 1 : 1 50.0% 1 : 1
11 55% 1 : 1.2 62.5% 1 : 1.7
12 60% 1 : 1.5 74.1% 1 : 2.9
13 65% 1 : 1.8 83.8% 1 : 5.2
14 70% 1 : 2.3 90.7% 1 : 9.8
15 75% 1 : 3 95.4% 1 : 20.6
16 80% 1 : 4 98.1% 1 : 53
17 85% 1 : 5.7 99.5% 1 : 215
18 90% 1 : 9 100% 1 : inf
19 95% 1 : 19 - -
20 100% 1 : inf - -
 
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