Roll to Dodge
A 2008 version, extracted from the bay12forums.
The GM (Game Master) posts a situation you, the players, are in. You then post your actions, exactly one action per turn. Once all players have made their actions, the GM posts again, with the results of the actions and the state of the world around you. After which you post actions again, ad infinitum.
The action results are defined by a six-sided die roll:
In addition, if at any time something threatens you, you get a free roll to dodge it. If you end up in a very bad situation as a result of the first dodge roll, you may or may not get another free roll to narrowly escape death.
Okay the whole forum is in the game. You all roll to dodge. Rocks fall, (roll-1) everybody dies.