It's funny 'cause I had ideas for a Homestuck Sburb RPG.
>2 modes, story and campaign
>Story = single player rpg that follows the story of homestuck, and you switch between the different characters' points-of-view
>Campaign = Create a character, random house, guardian, and medium are generated, online co-op with up to 12 people or 1 person and a bot
>Battle System - Varied
Each character in the story would have their own battle system.
John - Final Fantasy-esque rpg battles
Rose - Rhythm game. ie an action rpg where attacking to the beat does more damage.
Dave - 2d fighter, scott pilgrim style
Jade - Top-down shooter/FPS. (a system somewhat like fallout 3, minus VATS)
custom characters could choose a battle system
Random items around the house can be picked up (see: the pots pans plates etc in oblivion)
(Unlockable) Fetch Modi (Custom characters choose one from a list of what they've unlocked, story characters are obvious)
>ALCHEMY SYSTEM.
Some pre-determined recipes
"trait" system.
-Every item has an alchemizer trait (or 3 traits) and a strength number. When && combining 2 objects without a set result, you'll end up with a version of the item with the higher strength number, strengthened with the trait of the lower number.
-example: Spoon and Baseball Bat have no pre-determined result.
Baseball bat has a strength number of 10, spoon, of 2.
Spoon's trait is silver, baseball bat's is wooden.
You && combine them, and end up with a silver baseball bat.
NOW, let's say 2 items have the same first trait.
This is where those 2nd and 3rd traits come in.
Let's say you want to combine spoon (2) with butter knife (4).
Both items have the same first trait, silver.
Spoon's 2nd trait, blunt, doesn't match with the knife's "sharp", ao you end up with a blunt knife.
|| combining does the whole process in reverse. (the lower strength wins)