Sure! Here's a basic implementation of a 3D slow zombie shooter game RPG using JavaScript, HTML, and pictograms:
This implementation sets up a basic HTML canvas for the game and allows the player to control a character represented by the "🧟♂️" pictogram or any other pictogram you prefer. The player can move the character using the arrow keys on their smartphone, and the character's position will be redrawn accordingly.
Note that this is just a starting point for your game and lacks features such as enemies, shooting mechanics, levels, etc. You can expand on this implementation to create a complete 3D slow zombie shooter RPG according to your requirements.