It has changed again today.
So what you can earn yesterday is different from what you can earn today.
Here's a list of some of the game I played that pay quick NP. (If you have any, do let me know.)


Kass Basher
NP Ratio: 1.16
Must score 865 points to get 1,000np


The Search for Princess Lunara
NP Ratio: 13.64
Only need 75 points to get 1,000np
That's 5-6 questions depending on how fast you are.


Sutek's Tomb
NP Ratio: 0.66
You need 1520 points to get 1,000np


Shenkuu Warrior
NP Ratio: 4.62
You need 220 points to get 1,000np


Meepit Juice Break
NP Ratio: 0.99
You need 1010 points to get 1,000np


Ultimate Bullseye II
NP Ratio: 15.79
You need 64 points to get 1,000np


The Castle of Eliv Thade
NP Ratio: 2.64
You need 380 points to get 1,000np


Kiko Match II
NP Ratio: 4.13
You need 243 points to get 1,000np


The Usul Suspects
NP Ratio: 1.55
You need 645 points to get 1,000np


Defender Trainer
NP Ratio: 3.76
You need 267 points to get 1,000np


Evil Fuzzles from Beyond the Stars
NP Ratio: 2.68
You need 374 points to get 1,000np


Snow Wars II
NP Ratio: 7.32
You need 136 points to get 1,000np


Sophie's Stew
NP Ratio: 3.01
You need 333 points to get 1,000np


Jubble Bubble
NP Ratio: 1.25
You need 800 points to get 1,000np