Rêve: the Dream Ouroboros is a French fantasy role-playing game involving a mystical story of dragon dreams, orginaly published in French as Rêve de Dragon.
The game world has three levels: lower dreamlands, a land where characters live; middle dreamlands, a land where only magician-type highdreamers can reach to gather energy to cast spells; and higher dreamlands, a dragon-like land where characters go when they are asleep and to retrieve the memories of past lives.
Note: There is a simplified version of the game for beginners called Oniros.