HeroQuest 2 is a way of populating the HeroQuest board with monsters, treasure and traps.
You don't need any new rules for actually playing the game at all.
- Two new teams of 4 Heroes with Paper Standups. Different play from the original game without new rules. Mind attack, guns, insanity, swinging your axe all around you and so on.
- Random Solo and Cooperative Quests capability with no Zargon/Morcar needed. Random Quest cards gives you a random objective and fill the rooms for you.
- Optionally, a Variable Geometry Dungeon, with corridor and room tiles.
- No new rules, although setup is different. Feel free to add your own houserules. Such as Actually Using Mind Points and The Village.
You can have something like Advanced HeroQuest using the Variable Geometry Dungeon, Wandering monsters (from the Random Quest cards) and the Village, with new dungeon generation, but the same old HeroQuest combat and exploration rules.