Earlier today I saw Dan Sell’s explosive rules for Troika! and I really liked them, and wanted to mix in my own rules that I have used for explosives in the past. It's still troika tuesday for me anyways.
Explosives have three ranges (Listed in meters); the central, middle, and outer ranges. The victims in the central zone suffer double damage, the middle as normal, and the outer as a -1. Each creature between the blast source and the victim imparts a -1 to damage rolls. Victims suffer double damage if they are in an enclosed space where the shockwave can bounce.
Grenedoes = Small Explosion, Range 3/6/9.
Petard = Modest Explosion, Range 6/12/18 cone.
Light Cannon = Large Explosion, Range 5/15/25.
Heavy Cannon = Gigantic Explosion, Range 10/25/40.
With this I will keep using my own matrices but will use all the shit with the misfires and fuse legnth and stuff from his blogpost it seems like gold.