Mio energy water is pretty good!

OT: I'm pretty sure MK7 ot NSMB2 is my most played...

1. Fifa 12, 29:13
2. Ocarina of time, 21:35
3. Zen pinball, 21:18 (trying to beat bloody Seths scores)
4. Mario Kart 7, 19:30
5. Ridge racer, 12:58
6.Driver renegade, 9:32
7. New super Mario bros 2, 7:52
8.Super Mario 3D land, 7:39
9. Super monkey ball, 5:48
10. E shop, 5:15
11. Internet browser 4:36
12. Star Fox 64 3D, 3:43
13. 3DS camera, 3:37
14. Nintendo letterbox 2:30
15. Mario V Donkey Kong 2:23
16. Nintendo video, 2:15
17. Bird Mania 1:37
18.Eurosport 1:17
19. Face raiders, 1:06

My top ten, although Theatrythm will soon appear there :)

1. Mario Kart 7 - 45:01
2. Hotel Dusk - 38:38
3. Star Fox 3D - 33:41
4. Ghost Trick - 30:28
5. Street Pass Mii Plaza - 28:13
6. Super Mario 3D Land - 25:35
7. Mario vs DK Minis March Again - 23:21
8. Pictobits - 22:51
9. FF IV - 18:19
10. Contra 4 - 18:01

Yeah there is, this game:

It's got a demo, at least in Europe. But I was joking yes.

20 hrs on a demo is indeed pretty much, I also wouldn't tell .

i played a couple of hours of that demo
its pretty fun
no joke

1. Super Mario 3D Land - 11:32 (Very fun game. In my opinion it's the best 3D Mario since Mario 64. I got 4 stars)
2. Theatrhythm Final Fantasy - 1:50 (Just bought it and still playing. Fun!)
3. New Super Mario Bros. 2 - 0:17 (Just boring like all 2D Mario games)

I have Apollo Justice: Ace Attorney at number 1 with 28:44 playtime. I haven't had a DS so I play a lot of DS games. But I feel kinda lazy when I look some of the numbers you guys put up. Also, I gave my old 3DS to my brother and gifted him Pokemon White and after 2 weeks he already crossed 90 hours.....smh.

Updated play time list

1) Swapnote - 177:20 hours

2) Mario Kart 7 - 30:38 

3) The Denpa Men: They Came by Wave - 30:26

4) Zen Pinball 3D - 30:10

5) Netflix - 25:54

6) Heroes of Ruin - 22:09

7) Nintendo eShop - 21:26

8) Marvel Pinball 3D - 21:05

9) Let's Golf! 3D - 18:34

10) Super Mario 3D Land - 16:19

11) Freakyforms - 16:12

12) New Super Mario Bros. 2 - 15:44

13) Pushmo - 15:19

14) Pilotwings Resort - 14:02

15) Nintendo Video - 12:05

16) Internet Browser - 11:52

17) Friends List - 10:04

18) Nintendo 3DS Sound -  9:59

19) Steel Driver - 8:06

20) Sakura Samurai: Art of the Sword - 7:47

21) StreetPass Mii Plaza - 6:02

22) Kid Icarus: Uprising - 5:42

23) Bookstore Dream - 5:27

24) Balloon Kid - 4:15

25) Glory Days - 4:05

26) Mutant Mudds - 3:37

27) 3D Solitaire - 3:46

28) Super Mario Land 2 - 3:24

29) Activity Log 3:20

30) Super Street Fighter 4 - 3:15

Need to focus on Resident Evil (1:50 hours), Dillon's Rolling Western (2:45), and Kid Icarus (5:42) still...

Loved the short but sweet Gunman Clive (1:12) for only 2 dollars on eshop.  Also, picked up NightSky,  Crimson Shroud, Crashmo and a few other nice games off eshop recently.  Too many games...

Tagging the thread to post mine later

1) code of princess 92:53
2) kid icarus 79:34
3) devil survivor 2 48:20
4) mario kart 7 43:11
5) nintendo sound 28:28
and some others , i'm lazy to write them all