My friend Matt K. and I are discussing how to use LB for a gritty game and I posited that it should be related to Conditions. I'm suggesting to him that the following adjustments be put into play. We haven't tried them out and won't have a chance for a while, but I thought I'd share. Comments welcome!
Adjustment 1: Conditions are a little more free form than those given in the system, but we use those original Conditions as guideline/inspiration.
Adjustment 2: Conditions, when applicable, remove one success from your final roll.
Adjustment 3: After the GM tells the player what level of success is necessary, the player rolls as normal, using whatever resources they can to try to make the roll. If they fail, the GM may offer a Condition to allow a success.
Adjustment 3a: When a Condition is declined, the GM is allowed to make a Hard Move (a la Apocalypse World).
Adjustment 3b: When a Condition is accepted, in addition to Adjustment 2, the number of successes that it gave defines a cost and how permanent it is.
I'll explain the "number of successes" in just a second. Please note that the following bit is completely alterable by GM as to how hard a setting things are to be. Costs can be dropped or increased, no problem.
If you needed 4 successes and only had a total of 1 after everything was said and done, you therefore "bought" 3 successes to make the roll. If the GM is offering a tiered roll (2 Successes gives you X, 3 gives you X+, 4 gives you X++), then the player can decide how many successes they're "buying" with the Condition.
Number of Successes | Cost | Permanency
1 Success | 1 XP | Describe how you fix it in between scenes
2 Successes | 3 XP | Describe it being fixed in a Recovery Scene
3 Successes | 5 XP | Describe it being fixed with a Recovery Scene in this session and the next.
4+ Successes | 10 XP plus a permanent change to your character (Create a new tag!) | Permanent
Please note that Recovery Scenes still function as normal to recover your Pool.