To get you started, consider this: a 75-point army in the new editions is roughly the same as a 50-point army in Mk II (in terms of model count and game length); similarly, a 50-point army in the new editions is roughly the same as a 35-point army in Mk II.
Character restrictions are gone in multi-list events.
First, the amount of terrain per table is increasing from 5–7 pieces to 6–8 pieces. To complement that, the rules for how and where terrain can be placed—specifically in relation to scenario elements—are much more relaxed than before. If you want an obstruction in a zone, go for it. Want to put an obstacle near a flag? Feel free. Want to shove all of the terrain to the edges of the table? No can do. In fact, terrain can’t even be placed within a certain range of the table edges to ensure that the battlefield looks like…well, a battlefield, one full of meaningful terrain and not a big empty killing field.
In Rumble, the game is played on a 30″ x 30″ table or play area. Rumble games come with their own set of unique scenarios specifically designed for quicker engagement with players beginning the game so close to each other. Once you get started, a Rumble game feels like you’ve just started a WARMACHINE game on a 4′ x 4′ table right around the third round in terms of model positioning.
Of course, the big issue we had to solve with Rumble was turn-one caster assassinations. I won’t bog down this Insider with all the exact rules language, but the basic gist is that each player begins the game with only their Advance Deploy models in play. The rules then detail how on each player’s first turn, the rest of that player’s models either advance onto the table as if they were marching onto the battlefield from their table edge or are placed in play (for those models that can’t advance normally). After both players’ first turn is over, all of the models are in play, and everything carries on like normal, but this does mean that on the first player’s first turn, his or her opponent’s caster isn’t even on the table (because the opponent hasn’t resolved the step at the beginning of his turn to march forces onto the field).
C'est énorme ^^!