I've realised that plenty of gamers have been using Lion Rampant for fantasy games as well as or instead of the medieval games they were written for, so we thought it would be a nice idea to rework the rules specifically for this setting...

There are new rules for building your Retinue to allow for single or reduced model units (representing heroes, dragons, wizards, trolls, and other pure fantasy elements). This throws open all sorts of opportunities for using/collecting natty little models that you want but can't build a whole army around.
Rules for magic, larger creatures, the undead, flyers, and other fantasy elements are presented as an additional section to the battle rules, clearly showing how to include them in your games...

My design goals for Dragon Rampant tell you how I approached reworking the Lion Rampant rules for the fantasy setting:

Keep it fun. The emphasis is on a playable fantasy-themed game rather than an over-detailed simulation of battle.
Create a modern day throwback to 1970s and 1980s fantasy wargaming (in a positive way!): allow players breathing space to create their own worlds rather than forcing them to be tied to a line of miniatures.
Use no unusual dice, cards, or supplements… make it accessible for gamers new to the hobby.
Keep the rules simple, streamlined and abstracted where appropriate: don’t make players continually thumb through the rulebook...
Offer malleable army selection: no hard and fast army lists tied to manufacturer’s ranges.
Don’t allow magic or monsters to overpower gameplay: all troop types are equally valid in the right circumstances...

My overall goal was to design a fantasy miniatures game that is simple to learn, easy to adapt to your own preferred fantasy setting, and that gives me the same excitement that I had when I discovered fantasy gaming in the mid 1980s.