By the end of the year, the Stalker intends to see every film on the IMDb's Top 100 list (the link is to the top 250, but I'm sure you can work out which of those are also in the Top 100).

I would love to join in, but despite owning a number of DVDs (the number being more than pi and less than a googol) I haven't actually seen all that many films. Not ones that people consider classic, at least. So I will do as others have, and embolden the ones I have seen, and resign to not having seen the others.
For the time being.

1. The Godfather (1972)
2. The Shawshank Redemption (1994)
3. The Lord of the Rings: The Return of the King (2003)
4. The Godfather: Part II (1974)
5. Shichinin no samurai (1954) (The Seven Samurai)
6. Casablanca (1942)
7. Schindler's List (1993)
8. The Lord of the Rings: The Fellowship of the Ring (2001)
9. Citizen Kane (1941)
10. Star Wars (1977)
11. One Flew Over the Cuckoo's Nest (1975)
12. Pulp Fiction (1994)
13. The Lord of the Rings: The Two Towers (2002)
14. Star Wars: Episode V - The Empire Strikes Back (1980)
15. Rear Window (1954)
16. Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964)
17. Buono, il brutto, il cattivo, Il (1966) (The Good, The Bad, The Ugly)
18. The Usual Suspects (1995)
19. Raiders of the Lost Ark (1981)
20. Cidade de Deus (2002)
21. 12 Angry Men (1957)22. Memento (2000)
23. Psycho (1960)
24. C'era una volta il West (1968)
25. North by Northwest (1959)
26. Lawrence of Arabia (1962)
27. Fabuleux destin d'Amélie Poulain, Le (2001)
28. Goodfellas (1990)
29. The Silence of the Lambs (1991)
30. Sunset Blvd. (1950)
31. It's a Wonderful Life (1946)
32. American Beauty (1999)
33. Eternal Sunshine of the Spotless Mind (2004)
34. Apocalypse Now (1979)
35. The Matrix (1999)
36. Paths of Glory (1957)
37. Fight Club (1999)
38. Vertigo (1958)
39. The Third Man (1949)
40. Sen to Chihiro no kamikakushi (2001) (Spirited Away)
41. To Kill a Mockingbird (1962)
42. Singin' in the Rain (1952)
43. Double Indemnity (1944)
44. Boot, Das (1981)
45. Taxi Driver (1976)
46. M (1931)
47. The Pianist (2002)
48. Rashômon (1950)
49. Se7en (1995)
50. All About Eve (1950)
51. The Maltese Falcon (1941)
52. The Bridge on the River Kwai (1957)
53. Requiem for a Dream (2000)
54. Monty Python and the Holy Grail (1975)
55. Chinatown (1974)
56. Some Like It Hot (1959)
57. L.A. Confidential (1997)
58. Léon (1994)
59. Saving Private Ryan (1998)
60. Alien (1979)
61. American History X (1998)
62. Modern Times (1936)
63. Mr. Smith Goes to Washington (1939)
64. The Treasure of the Sierra Madre (1948)
65. The Wizard of Oz (1939)
66. The Manchurian Candidate (1962)
67. The Sting (1973)
68. On the Waterfront (1954)
69. Kill Bill: Vol. 1 (2003)
70. Raging Bull (1980)
71. Ran (1985)
72. Amadeus (1984)
73. Vita è bella, La (1997)
74. Touch of Evil (1958)
75. The Great Escape (1963)
76. A Clockwork Orange (1971)
77. City Lights (1931)
78. Reservoir Dogs (1992)
79. The Apartment (1960)
80. 2001: A Space Odyssey (1968)
81. Metropolis (1927)
82. The Shining (1980)
83. High Noon (1952)
84. Jaws (1975)
85. Aliens (1986)
86. Finding Nemo (2003)
87. Annie Hall (1977)
88. Braveheart (1995)
89. Million Dollar Baby (2004)
90. Wo hu cang long (2000) (Crouching Tiger, Hidden Dragon)
91. Fargo (1996)
92. Kill Bill: Vol. 2 (2004)
93. Oldboy (2003)
94. Yojimbo (1961)
95. The Incredibles (2004)
96. Blade Runner (1982)
97. Strangers on a Train (1951)
98. Donnie Darko (2001)
99. The Sixth Sense (1999)
100. The Princess Bride (1987)

I make that 34 (Edit: 38). Barely a third. I'm embarrassed, approaching ashamed, but at least now I know what I should be looking for. Best go and join Blockbuster.
Maybe I'll catch up by the end of next year.

Notice that there are a handful in there that I probably have seen. I've probably seen Psycho. I think. But if I wasn't sure, I left it plain. Got to have seen them well enough to remember which they are, I reckon, if everyone thinks they are so good...