Unified Ability Modifier

The unified (Score - 10) / 2 modifier used for all d20 rolls.

LaGrange uses a single unified ability modifier for all d20 rolls. Formula: Modifier = floor((Score - 10) / 2). This replaces the separate legacy combat adjustment tables; the unified modifier applies to attacks, saves, skill checks, and ability checks. Secondary tables such as Force Open and System Shock remain as non-d20 specific Mechanics.

Rules Reference

Field	Value
Data / 1 / Modifier	-5
Data / 10 11 / Modifier	0
Data / 12 13 / Modifier	1
Data / 14 15 / Modifier	2
Data / 16 17 / Modifier	3
Data / 18 19 / Modifier	4
Data / 2 3 / Modifier	-4
Data / 20 21 / Modifier	5
Data / 22 23 / Modifier	6
Data / 24 25 / Modifier	7
Data / 26 27 / Modifier	8
Data / 28 29 / Modifier	9
Data / 30 31 / Modifier	10
Data / 4 5 / Modifier	-3
Data / 6 7 / Modifier	-2
Data / 8 9 / Modifier	-1

Columns

modifier

Field	Value
description	Unified modifier added to all d20 rolls governed by this ability.
label	Modifier
name	modifier