Game Mechanics

The in-house system use exploding D6 for all rolls. The DM can use a D100 for percentage rolls.

Exploding dice; a 6 results in taking that die and a new, then rolling both. Continue until no more 6s are rolled.

Skill check / difficulty roll - 

roll Xd6, result should be below threshold. Results above threshold is a failed roll.

Normal difficulty is 3d6

Easier roll; remove die from total 

Harder roll; add die to total

Critical rolls -

Success; all dice show 1 except one (getting a 6 cancels the crit, even if the roll is successful). If the difficulty is only one die, a result of 1, 2 or 3 is a crit success.

Fail; getting two or more dice to show 6, there is a risk for critical failure. If the check fails, the roll is a crit fail

Scale of difficulty

Damage roll 

Roll the amount of dice told by the weapon+damage bonus. If skill check was a critical success, add one die to damage roll. Damage rolls are also exploding dice. Final sum is the damage done.

DM roll; d100, percentage roll, or contested roll with Xd6