When a character attempts an action, the player rolls a 20-sided die (D20).
The result of the die is then combined with the character's appropriate attribute modifier to determine the final outcome. This mechanic is called a test roll or simply a test.
D20 + Strength (STR) for a physical action, D20 + Intelligence (INT) for an intellectual action.
This outcome is compared to a success threshold set by the GM, who may choose to announce it in advance or not.
Unlike tests conducted in combat phases, the character's level is never added to the result. We will return to this concept in the section dedicated to combat.
Success and Failure
To determine whether an action is successful or fails, the final result is compared to a predetermined threshold. If the result meets or exceeds the success threshold, the action is a success. If the result is below the threshold, the action fails.
Thresholds may vary based on the difficulty of the action and the circumstances. Some actions may also have thresholds for critical success or critical failure, resulting in exceptional outcomes.
The table below provides success thresholds that need to be met or exceeded on a D20 roll for different levels of action difficulty. You can adjust these thresholds to suit the atmosphere and challenge level you want for your adventures.
| Difficulty | Success Threshold |
|---|---|
| Very Easy | Between 1 and 4 |
| Easy | Between 5 and 9 |
| Moderate | Between 10 and 14 |
| Hard | Between 15 and 19 |
| Very Hard | 20 or more |
Critical Success
When a player rolls a D20 for an action and gets a natural result of 20, they achieve a critical success. This means that not only is the action successful, but it also yields significant benefits or exceptional results.
The consequences of a critical success can vary depending on the situation, but here are a few examples:
- Spectacular Success: The character performs the action exceptionally well, impressing onlookers and gaining a +2 bonus on their next similar action.
- Unexpected Discovery: While searching for clues in a room, the character uncovers a hidden element that could be crucial to the plot.
- Time Gain: The character completes a task more quickly than expected, leaving them time to rest or undertake another action.
Critical Failure
When a player rolls a D20 for an action and gets a natural result of 1, they suffer a critical failure. This means that not only does the action fail, but it may also lead to additional obstacles or negative consequences.
The consequences of a critical failure can vary depending on the situation, but here are a few examples:
- Catastrophic Failure: The character spectacularly fails the action, eliciting mock laughter from onlookers and suffering a -2 penalty on their next similar action.
- Surprise Complication: While trying to disarm a trap, the character might accidentally trigger it, creating an even more dangerous situation.
- Time Loss: The character wastes time by failing, delaying their efforts and allowing other elements of the plot to develop.