As far as i'm aware Nicalis doesn't do mobile stuff and the controls would be annoying (unless you got a fancy mobile controller thing).
I'm pretty sure it won't happen.
If you want a mobile version just get either the psp port along with ppsspp or get 3ds E-shop cs.
@Miccs Well, Nicalis DID make Issac: Rebirth for iOS, so they do make iOS games. But, @Walrus_Guy , as Noxid and Miccs said, get the 3ds version or Kero Blaster. You can also get the switch or PSP version if you don't have a 3ds. And if you really want it, install NXengine with jailbreak.
Hey! A list of all the better portable versions of CS! 1. Switch 2. 3ds 3. DSi (Currently unavailable) 4. PSP 5. Any Portable console you can shove NXEngine or PPSSPP on. 6. Phone with RetroArch (With bluetooth controller)
I'm pretty sure it won't happen.
If you want a mobile version just get either the psp port along with ppsspp or get 3ds E-shop cs.