Without going in to too much detail of the theme, here is the basic mechanic I have for a game I've been working on. Primarily, it's being designed for 4-6 players (I think), but it may work also for 2 or 3.
Players collect cards, there are 30 cards in the game, there are ways that the cards can change hands between players and/or be replaced to the draw pile - or you might get a card that no-one else wants so you keep it for the whole game.
Each card contains three pieces of information - for the sake of argument, let's say a colour, a shape and a number. In the deck of 30 cards, there are 10 colours, 10 shapes and 10 numbers and each colour, shape and number is used 3 times - but no two cards are the same.
E.g one card may have RED, CIRCLE, 6 - no other card will have this combination, or any combination of 2 of these 3 things.
The object is to collect complete 'sets' of 3. E.g all 3 reds, circles or sixes.
When a player has a set, they get a unique token for that particular set - e.g the Red token, the circle token, the 6 token - after that no other player can attain that particular token, but any unclaimed tokens are up for grabs, so no card is 'dead' unless the three 'sets' it features have already been collected.
Game continues until one player has a certain number of tokens, let's say 5? (this will hopefully be worked out through playtesting).
I suppose I have the same questions as anyone else in this position:
1. Has this been done? Or is there anything similar I should be aware of?
2. Bearing in mind I haven't told you what theme I'm planning, or how cards are attained and swapped, but from the dry description here - does it sound like it might be fun?
Thanks