How could you not have unknown IPT games? Half of my ipod is filled with them. I suggest you check out a game called squareball. Unknown but amazing!
Unknown to Toucharcade members or iOS users in general? Infinity Project is a good FPS that's pretty unknown these days.
Sorry not to clarify. Unknown meaning nobody has seen before. A great game that is just waiting to get an award for the best game ever made but can never get it because no one knows about it. A game that has been forgotten throughout these years of hitting so many apps I cannot even count. Hopefully that helps. Any questions just keep asking and I still want to find a game like I just described.
I think it was IGN that reviewed Squareball and gave it a positive score, so it's not as unknown as you think.
Oh, and my vote goes to iDrop Dead. The screenshots really don't do it justice. I even enjoyed the game enough to help with some graphics for the Flower Edition and one of my characters from a forum competition is in there too A warning though: Don't buy both versions. The Flower Edition is basically the same game with blood removed at the request of Apple and then a few later additons added. It has a bit more content than the original game because the original can't be updated or it'll just be rejected. P.S. The PiƱata was my character!
So why? You ask for unknown games, that is OK, but why the best? The best games are already known to everybody and they are worthy to buy and play. That's it. Try hard to find an unknow game is meaningless and unless you want to be stand out to be the first to play an awesome game that nobody ever knows. Forget it.