Rolling in ROA

Checks
Strength/Perception/Agility/Stealth/Charisma checks - These checks add your stat modifier to your 1d6 roll. Your GM Will roll (x)d20 to see if your check is successful. The amount of d20(s) used will be based off if you have over 20 points in said stat. Every 20 more points you have in said stat will add one more d20.

Rolling for Success - When you need to see if you're able to do something that you are not sure if you can, you roll a d20 against your GM's d20. Who ever has the higher number is the outcome. If yours is higher you may. If your GM's is then you can not. Attack roll - 1d20 adds a bonus on your Basic attack roll. You can apply this bonus to Elemental Basic attacks as well.
 * You roll success rolls for Abilities and basic attacks as well to see if said ability or attacks miss. Some feats will disable this roll.

Knowledge - When rolling for knowledge you roll a 1d6 and apply your Knowledge stat. (Which will never be higher than 16) The GM then will tell you if you have enough knowledge to do said task by ether having a set number or rolling a d20.
 * If you need a specific knowledge pathway to understand said thing, the GM will inform you that you need "this type" of knowledge to understand this. If you have that knowledge then you apply that stat modifier and roll the d6. The GM will roll a d20 against it.
 * Rolling a Natural 6 will not mean you automatically can understand.

Rolling for Movement - When moving on the Table top grid. You roll a 1d6 and apply your speed modifier. A specific Modifier for speed is every 10 points of speed you add 1 to your movement roll.

Critical
Rolling a Success 1d20 to a Natural 20 allows you a crit of 1d4 with a chance to be fatal.

Against higher leveled creatures your Crits are multipliers. If you roll a (4) your attack is fatal.

If you're fighting a boss or similar leveled opponent your crit is extra damage.

In defense, Successful crit against your opponent(s) attack allows you for a counter attack. Allowing you to hit them with a basic attack that can not be dodged/blocked/miss.