BioShock [J2ME]

I'm fascinated by demakes, in this case a 2D version of Bioshock released for Java phones in 2010. The following chapters were canceled, so this is only about a quarter of the original game, but still a very faithful translation. Up until the explosion at Smugglers Cove, everything follows the same pattern. With a huge number of weapons (even the different ammo types!), plasmids, diary entries and other items, the game is very impressive and actually fun.
Since the port was developed to run on a potato, you can emulate it on almost any system (I played it on the PSP) if you're interested.

Pretty impressive.

Demakes on feature phone mostly pretty simple & straightforward (even the demakes made by Gameloft), but some devs from India successfully made a beautiful demake of one of the greatest FPS ever, everything is really translates well & very remarkable for a feature phone game. The only downside tho is I don't really understand what the 'voice notes' you found tryin to tell the player, even tho the existence of it still pretty impressive & adds the environmental immersion