Munkiki's Castles

Game released in 2002, exclusively for the Nokia 3410 via the Club Nokia service. It was one of the first ever mobile games to feature 3D graphics and also one of the first ever mobile games released for the Java ME platform, albeit only for the Nokia 3410. The game features a character named Munkiki wandering around the 3D landscape by pushing and destroying the blocks to try and collect items to finish the levels.
Technically, it was one of the first ever mobile games to feature 3D graphics, one year before OpenGL ES was standardized. Because of the limitations of the original Java ME (known as J2ME 1.0), Nick Reed and Nick Slaven had to develop a proprietary API for this game, exclusively for the Nokia 3410 mobile phone, which allows rudimentary 3D graphics rendered on a black and white cellphone display.

The Club Nokia service had already been shut down and only a very few Nokia 3410 handsets do have this game installed. Two videos of this game, as well as screenshots for this game, had been surfaced on the Internet prior to the discovery of the .jar executable file of the game and the M3D class file on July 10th, 2017, and on May 29th, 2018, respectively.

Additional information: https://lostmediawiki.com/Munkiki's_Castles_(found_Nokia_3410_mobile_game;_2002)