Danger Cards

From the introduction:

Action using this mini-system proceeds as usual in a roleplaying game; players describe their actions, the guide responds with results, and so on. The rules are engaged when the Guide thinks that the actions are dangerous and would like to add a somewhat random element to play.

User summary:

These print-and-play cards present an essentially self-contained "mini-system" to use in any roleplaying game. Although they feature a light fantasy genre, they could easily be adapted to any other genre.