My personal favourite mechanic from working on Disaster Strikes! is the Doomsayer, aka the Cassandra. They’re there in every disaster movie[*]. The person who repeatedly warns that everything is about to go belly up, only to be ignored until it is far too late. Charlton Heston in The Towering Inferno, Ripley in Aliens, Dustin Hoffman in Outbreak!.
DS! turns this into part of the game rules. One person has the job of being the predictor of the doom to come.
Special: Prediction. During the first Act, your protagonist makes dire predictions which will come true, but which everyone else will ignore. At any time during the first Act you may make an In Character statement pointing out a risk, a weak spot or possible threat. Your statement is true. In this way you can help foreshadow the threat and what will happen in the second and third Acts. Don’t forget to stay consistent with what’s already agreed – no fair turning the volcano into a flood, or whatever. And of course, you must not use this ability to weaken the threat – your role is to enhance it.
Note: during the first Act, nobody except the person with the above special is permitted to attend to the threat. They either fail to notice it, ignore it, discount it as not as bad as it seems, or focus on other priorities. Meanwhile the nature of the disaster will be such that if the Doomsayer tries to stop it by themselves they will certainly fail. On the plus side, the disaster is only embryonic and certainly not out-of-control at this point.
Meanwhile the DM and the players have a perfect view of what is coming – just as they would in a disaster movie. The Doomsayer is handing opportunities to the DM for dramatic situations in later Acts, and to the player to figure out how they might deal with them. Not to mention getting to take part in the creative process like no other player – apart from the DM.
In DS!, Act I is for introducing the setting, the characters and their relationships, and foreshadowing the disaster. The doomsayer plays an important role in that. The remaining specials are chiefly concerned with Act II – when the threat kicks off in earnest. More on this soon.
[*] Possible hyperbole alert. I haven’t watched all or even most disaster movies. Yet.