(Again, all errata, thanks to Defendi)
Grenades: Grenades are more deadly to people close to them. There are no modifiers to the attack roll on the grenade itself (not to be confused to the roll for determining where it landed) but the blast radius of the target. Use the following chart to determine the blast radius of the attack.
Distance from Grenade Modifier
In Contact +100
Up to 2m +90
Up to 4m +80
Up to 6m +70
Up to 8m +60
Up to 10m +50
Up to 12m +40
Up to 14m +30
Up to 16m +20
Up to 18m +10
Up to 20m +0
Up to 22m -10
Up to 24m -20
Up to 26m -30
Up to 28m -40
Up to 30m -50
Up to 32m -60
Up to 34m -70
Up to 36m -80
Up to 38m -90
38m+ -100
Distance from Nuclear Grenade Modifier
1st Blast Radius Obliterated
2nd Blast Radius +100
3rd Blast Radius +80
4th Blast Radius +60
5th Blast Radius +40
6th Blast Radius +20
7th Blast Radius +0
8th Blast Radius -20
9th Blast Radius -40
10th Blast Radius -60
11th Blast Radius -80
Grenade Launcher ranges:
0m-1m: +10*
2m-8m: +0*
9m-16m: -25*
17m-80m: 0
81m-150m: -100
*Minimum safe range in combat is 38m.