Here is a concise summary of the provided text:
**Sword Quest Series by Atari (1982-1983)**
* A series of adventure games (Earth World, Fire World, Water World, and the unreleased Air World) based on ancient elements and mythology.
* Each game came with:
+ A poster
+ A DC comic book
+ A chance to win real, valuable treasures (e.g., 18k gold talismans, platinum chalices) by solving in-game clues.
* Contestants would submit their findings, and finalists would compete at Atari HQ.
* **Outcome:**
+ Earth World and Fire World contests were completed, with winners receiving prized treasures.
+ Water World's contest was cancelled due to the 1983 video game crash.
+ Air World was never released.
* **Mystery:** The current whereabouts of the remaining treasures, valued at $150,000 in 1982, are unknown, sparking a call to revive the contest and find the true bearer of the sword.
Here are the key facts extracted from the text, each with a number and in short sentences:
1. **Game Series**: The text discusses the "Sword Quest" game series for the Atari 2600.
2. **Game Themes**: Each game was based on one of the four ancient elements: Earth, Fire, Water, and (planned) Air.
3. **Gameplay**: Players navigated mystical chambers to find hidden treasures, solving clues to progress.
4. **Prizes**: Atari offered significant prizes for each game, valued at $25,000 each in 1982-83.
5. **Earth World Prize**: The winner received a talisman made of 18K solid gold, studded with 12 diamonds and zodiac birthstones.
6. **Fire World Prize**: The winner got a chalice made of platinum and gold, studded with diamonds, rubies, sapphires, pearls, and green jade.
7. **Water World Prize**: The planned prize was a gold crown decorated with diamonds, rubies, sapphires, and aquamarines.
8. **Air World Prize**: The planned prize was a Philosopher's Stone (white jade in an 18K gold box adorned with emeralds, rubies, and diamonds).
9. **Grand Prize**: The overall winner (across all games) would receive a jewel-encrusted sword valued at $50,000.
10. **Total Prize Value**: The total value of all prizes was approximately $150,000 in 1982-83.
11. **Game Release**: Games were released one at a time, with club members receiving the game, a t-shirt, a poster, and a DC comic book.
12. **Competition Format**: Players sent in clues; finalists competed at Atari HQ with custom-made game versions.
13. **Earth World Winner**: Stephen Bell, a 20-year-old, won out of 5,000 entries.
14. **Fire World Winner**: Michael Ridout won after a tiebreaker, receiving the golden chalice.
15. **Water World Release**: Due to the 1983 video game crash, Water World was released in limited quantity, making it extremely rare.
16. **Water World Differences**: It had only 7 rooms, based on a chakra structure, with water-themed action scenes.
17. **Air World Status**: The game was never made, though a prototype is rumored to exist.
18. **Contest Cancellation**: The Sword Quest contest was cancelled due to Atari's financial problems and subsequent sale.
19. **Treasures' Fate**: The location of the remaining treasures (crown, Philosopher's Stone, and possibly the sword) is unknown.
20. **Rumor**: Some speculate that Jack Trammell, who bought Atari, might possess the sword (and possibly other treasures).