Originally Posted by StaggerLee
Dark Incursion engine supports full spectrum of 3D rendering methods (unfortunately, anaglyph is only one currently available for iOS) so there is an impact on performance. If you can check the game in 3D mode (you need any red/blue 3D glasses) you will see that there are dozens of layers scrolling at the same time (many of them animated). On some devices (LG 3D phone for example) game looks really spectacular.
Optimizing it for 2D only will take a while due to the way how the scenes are designed and rendered. Hopefully we will see 3D screen on iPhone soon!
Even still, I can't imagine that a 4S or iPad 2 would really have issues hitting 60 fps with this game.
That said, I would give up 3D for 60 fps anytime. The higher framerate makes for an infinitely more playable game. Are you guys using a limiter of some sort or is this hard coded in? The 3DS can deliver actual 3D and I've found that I rarely use it anymore. It was a fun gimmick, but it actually detracts from the experience for me (too much cross talk).