RTD is simple, each player plays as a character and each turn performs an action (can be any action the player wants). The DM will roll a 1d6 to determine how successful.
[1] - Epic Fail. The action was not performed, and backfired horribly.
[2] - Fail. Nothing happened.
[3] - Partial Success. The exact degree of success is established by the GM.
[4] - Success. The action was carried out adequately.
[5] - Epic Success. The action succeeded in the most positive way possible.
[6] - Overshot. Though the result was achieved, the action backfires horribly due to disproportionately large effort.