Name that NES game!

[Sir O]

The 18 I got on my own:

<!-- spoilerKillit --><table border="0" cellpadding="0" cellspacing="0"><tr><td bgcolor="#FFE3F5" valign="middle" align="left"><font color="#000000" size="1">Spoiler (Highlight to Read):</font>
</td></tr><tr><td bgcolor="#000000" valign="middle" align="left"><font color="#000000" size="1"><!-- spoilerKillitEnd --><!--txtStart-->3. Castlevania 2
4. Zelda II
5. Mario Bros.
7. TMNT
9. Blades of Steel
11. Contra
12. Duck Hunt
13. Mach Rider
15. Metal Gear
16. Ice Climber
19. Shadowgate
23. Kirby's Adventure
27. Ikari Warriors
31. Pro Wrestling
35. Track and Field II
36. Batman
37. Wrath of the Black Manta
38. Metroid[/spoiler]




After posting this on another site, others have gotten:

[spoiler]1. Gunsmoke
2. Gradius
6. The Guardian Legend
10. Werewolf
17. Battletoads
18. Legend of Kage
20. Kickle Cubicle
21. Rad Gravity
22. Super Turrican
24. Double Dragon 2
25. River City Ransom
26. Solar Jetman
28. Ufouria
29. Willow
30. Ninja Gaiden
32. Cobra Triangle
34. Little Samson
39. Wizards and Warriors
40. Kabuki<!--txtEnd--><!-- spoilerKillit --></td></tr></table><!-- spoilerKillitEnd -->

All that's missing are 8, 14, and 33.</font>