[RPG] How to read a 4-sided die

There's a built-in explode function, but you have to use it before doing your other processing. Specifically, use FOOdBAR to have BAR evaluated as a sequence and used to generate FOO "dice" with arbitrary side counts and values. Here, DICEd([explode d6]) does the job, turning an exploded d6 into the base for the actual roll. (explode doesn't separate dice that you give it — you have to do that, or you'll get a 5d6 roll that only explodes, once, on 30.)

You can't compare sequences to a threshold to get a list or sum of values against that threshold — you'll just get the sequence summed and checked against the threshold. Instead, use [count VALUES in SEQUENCE] for each of the valid values (3-6). And as it turns out, since every 6 triggers a new die and all those dice count, you can just double-count 6s once exploded. So really that should be [count {3..6, 6} in ROLL].

The results, as best I can manage, aren't pretty. Each explosion will either fumble harder (1), make no progress against fumbling (2-5), or break even and get a new chance to do the same thing (6), and the more dice you start with, the more chances for explosions. There is no provision for fumbles to peter out in explosions, as one would expect from a great success; the only question is whether the chain ends with a 1 or not.

The logo on the dice is the Shadowrun logo. Those dice are for the Shadowrun RPG.

The game itself uses a result of 5 or 6 as a "hit", a result of 2 to 4 as a "nothing" and a result of 1 as a "glitch", and in some cases a 6 is better than a 5 (similar to a critical hit). This is consistent with how your dice are marked (Shadowrun logo means "hit", nothing at all means "glitch", but 5 of the 6 numbers are still marked for when they are needed, or in case you need regular six-sided dice.)