I came across this list while browsing the National Games Week website (the Pokemon Organized Play website links to it since it's a sponsor). They have the list of top 100 games of 2005. Pokémon beats Yu-Gi-Oh AND Monopoly! Take that! 
1. Heroclix, Wizkids Inc.
2. Dungeons & Dragons, Wizards of the Coast
3. Magic: The Gathering CCG, Wizards of the Coast
4. Settlers of Catan, Mayfair Games
5. Mechwarrior, Wizkids Inc.
6. Carcassonne, Rio Grande Games
7. Pirates of the Spanish Main, Wizkids Inc.
8. Puerto Rico, Rio Grande Games
9. Ticket to Ride, Days of Wonder
10. Star Wars Minatures, Wizards of the Coast
11. Axis & Allies, Wizards of the Coast / Avalon Hill
12. Warhammer 40,000, Games Workshop
13. Memoir '44, Days of Wonder
14. Mage Knight, Wizkids Inc.
15. Risk, Parker Brothers
16. Pokémon TCG, Pokémon USA
17. Munchkin, Steve Jackson Games
18. Monopoly, Parker Brothers
19. Yu Gi Oh, Upper Deck Entertainment
20. Vs. System, Upper Deck Entertainment
21. Shadows Over Camelot, Days of Wonder
22. Apples to Apples, Out of the Box
23. Dungeons & Dragons Miniatures, Wizards of the Coast
24. Power Grid, Rio Grande Games
25. Vampire: The Masquerade, White Wolf Publishing
26. RoboRally, Wizards of the Coast / Avalon Hill
27. Scrabble, Milton Bradley Games
28. Heroscape, Hasbro
29. Warmachine, Privateer Press
30. Fluxx, Looney Labs
31. Battletech, FanPro
32. Tigris & Euphrates, Mayfair Games
33. Killer Bunnies, Playroom Entertainment
34. Chess
35. Blokus, Educational Insights
36. Tsuro, Wizkids Inc.
37. Warhammer Fantasy, Games Workshop
38. El Grande, Rio Grande Games
39. Princes of Florence, Rio Grande Games
40. Lord of the Rings TCG, Decipher Inc.
41. Shadowrun, FanPro
42. Ticket to Ride Europe, Days of Wonder
43. Bohnanza, Rio Grande Games
44. Rocketman: Axis of Evil, Wizkids Inc.
45. Trivial Pursuit, Milton Bradley Games
46. Alhambra, Uberplay Entertainment
47. Civilization, Eagle Games
48. Lost Cities, Rio Grande Games
49. Samuari, Rio Grande Games
50. Cranium, Cranium
51. Zombies!!!, Twilight Creations
52. Call of Cthulhu, Chaosium
53. Star Wars CCG, Wizards of the Coast
54. Twilight Imperium, Fantasy Flight Games
55. Through Desert, Fantasy Flight Games
56. Acquire, Wizards of the Coast
57. Age of Steam, Café Games Limited
58. Legend of the Five Rings CCG, Alderac Entertainment Group
59. San Juan, Rio Grande Games
60. Attika, Rio Grande Games
61. Bang!, Mayfair Games
62. Betrayal at House on the Hill, Wizards of the Coast / Avalon Hill
63. Duel Masters, Wizards of the Coast
64. Rifts, Palladium Books
65. Citadels, Fantasy Flight Games
66. Anachronism, Tri King Games
67. Ra, Uberplay Entertainment
68. Tikal, Rio Grande Games
69. Werewolf, White Wolf Publishing
70. Cosmic Encounters, Wizards of the Coast / Avalon Hill
71. Ingenious, Fantasy Flight Games
72. Axis & Allies Miniatures, Wizards of the Coast
73. Clue, Milton Bradley Games
74. For Sale, Uberplay Entertainment
75. Formula De', Euro Games
76. Guillotine, Wizards of the Coast
77. Runebound, Fantasy Flight Games
78. Star Wars RPG, Wizards of the Coast
79. Arkham Horror, Fantasy Flight Games
80. Blood Bowl, Games Workshop
81. Goa, Rio Grande Games
82. GURPS, Steve Jackson Games
83. Talisman, Games Workshop
84. Amun Re, Rio Grande Games
85. Diplomacy, Wizards of the Coast / Avalon Hill
86. Time's Up, R&R Games
87. City of Heroes CCG, Alderac Entertainment Group
88. SET, SET Enterprises
89. Titan, Avalon Hill
90. UNO, Mattel
91. Wizard Card Game, U.S. Game systems
92. Diamant, Schmidt Spiele
93. History of the World, Milton Bradley Games
94. Lord of the Rings Miniatures, Games Workshop
95. Modern Art, Mayfair Games
96. Pirate's Cove, Days of Wonder
97. Risk 2010, Wizards of the Coast / Avalon Hill
98. TransAmerica, Rio Grande Games
99. Vegas Showdown, Wizards of the Coast / Avalon Hill
100. 100 Warlord CCG, Alderac Entertainment Group
From National Games Week
1. Heroclix, Wizkids Inc.
2. Dungeons & Dragons, Wizards of the Coast
3. Magic: The Gathering CCG, Wizards of the Coast
4. Settlers of Catan, Mayfair Games
5. Mechwarrior, Wizkids Inc.
6. Carcassonne, Rio Grande Games
7. Pirates of the Spanish Main, Wizkids Inc.
8. Puerto Rico, Rio Grande Games
9. Ticket to Ride, Days of Wonder
10. Star Wars Minatures, Wizards of the Coast
11. Axis & Allies, Wizards of the Coast / Avalon Hill
12. Warhammer 40,000, Games Workshop
13. Memoir '44, Days of Wonder
14. Mage Knight, Wizkids Inc.
15. Risk, Parker Brothers
16. Pokémon TCG, Pokémon USA
17. Munchkin, Steve Jackson Games
18. Monopoly, Parker Brothers
19. Yu Gi Oh, Upper Deck Entertainment
20. Vs. System, Upper Deck Entertainment
21. Shadows Over Camelot, Days of Wonder
22. Apples to Apples, Out of the Box
23. Dungeons & Dragons Miniatures, Wizards of the Coast
24. Power Grid, Rio Grande Games
25. Vampire: The Masquerade, White Wolf Publishing
26. RoboRally, Wizards of the Coast / Avalon Hill
27. Scrabble, Milton Bradley Games
28. Heroscape, Hasbro
29. Warmachine, Privateer Press
30. Fluxx, Looney Labs
31. Battletech, FanPro
32. Tigris & Euphrates, Mayfair Games
33. Killer Bunnies, Playroom Entertainment
34. Chess
35. Blokus, Educational Insights
36. Tsuro, Wizkids Inc.
37. Warhammer Fantasy, Games Workshop
38. El Grande, Rio Grande Games
39. Princes of Florence, Rio Grande Games
40. Lord of the Rings TCG, Decipher Inc.
41. Shadowrun, FanPro
42. Ticket to Ride Europe, Days of Wonder
43. Bohnanza, Rio Grande Games
44. Rocketman: Axis of Evil, Wizkids Inc.
45. Trivial Pursuit, Milton Bradley Games
46. Alhambra, Uberplay Entertainment
47. Civilization, Eagle Games
48. Lost Cities, Rio Grande Games
49. Samuari, Rio Grande Games
50. Cranium, Cranium
51. Zombies!!!, Twilight Creations
52. Call of Cthulhu, Chaosium
53. Star Wars CCG, Wizards of the Coast
54. Twilight Imperium, Fantasy Flight Games
55. Through Desert, Fantasy Flight Games
56. Acquire, Wizards of the Coast
57. Age of Steam, Café Games Limited
58. Legend of the Five Rings CCG, Alderac Entertainment Group
59. San Juan, Rio Grande Games
60. Attika, Rio Grande Games
61. Bang!, Mayfair Games
62. Betrayal at House on the Hill, Wizards of the Coast / Avalon Hill
63. Duel Masters, Wizards of the Coast
64. Rifts, Palladium Books
65. Citadels, Fantasy Flight Games
66. Anachronism, Tri King Games
67. Ra, Uberplay Entertainment
68. Tikal, Rio Grande Games
69. Werewolf, White Wolf Publishing
70. Cosmic Encounters, Wizards of the Coast / Avalon Hill
71. Ingenious, Fantasy Flight Games
72. Axis & Allies Miniatures, Wizards of the Coast
73. Clue, Milton Bradley Games
74. For Sale, Uberplay Entertainment
75. Formula De', Euro Games
76. Guillotine, Wizards of the Coast
77. Runebound, Fantasy Flight Games
78. Star Wars RPG, Wizards of the Coast
79. Arkham Horror, Fantasy Flight Games
80. Blood Bowl, Games Workshop
81. Goa, Rio Grande Games
82. GURPS, Steve Jackson Games
83. Talisman, Games Workshop
84. Amun Re, Rio Grande Games
85. Diplomacy, Wizards of the Coast / Avalon Hill
86. Time's Up, R&R Games
87. City of Heroes CCG, Alderac Entertainment Group
88. SET, SET Enterprises
89. Titan, Avalon Hill
90. UNO, Mattel
91. Wizard Card Game, U.S. Game systems
92. Diamant, Schmidt Spiele
93. History of the World, Milton Bradley Games
94. Lord of the Rings Miniatures, Games Workshop
95. Modern Art, Mayfair Games
96. Pirate's Cove, Days of Wonder
97. Risk 2010, Wizards of the Coast / Avalon Hill
98. TransAmerica, Rio Grande Games
99. Vegas Showdown, Wizards of the Coast / Avalon Hill
100. 100 Warlord CCG, Alderac Entertainment Group
From National Games Week