Identifying the Card Game "2000": Rules and Variants

There is no widely recognized standard card game named "2000." It is likely a regional, house-ruled, or family-specific variant.

To help identify it, please provide:

• Where you learned the game (region, family, online)
• The deck composition (standard 52-card, multiple decks, specialized cards)
• Any rules or objectives you recall (scoring, melds, trick-taking, shedding)

With more details, I can match it to known games like Rummy 500, Pinochle variants, or Canasta derivatives that use high target scores.