Classic FPS Engine for Game Maker Studio 2

This is a full template to make classic FPS games in Game Maker Studio 2, specifically in the style of Wolfenstein 3D, Blake Stone, or Catacomb 3D. Free demo file included.

What's in this "full game structure" project template?

• Auto-generation of a 3D level (maze) by simply drawing tiles on layers in the room editor. Creating a level for your game can be done in only a few minutes of work (or longer depending on how detailed your design is). This works for a floor layer, a wall layer, a ceiling layer, and a few more like wall pieces that go above doors if desired. If you are familiar with drawing tiles on a 2D layer in Game Maker Studio 2, you won't need to do much more to design a 3D maze.
• Shoot enemies (or attack them with a melee attack) . Enemies have a basic behaviour that makes them attack you as well. One enemy is included with a full enemy AI logic.
• System for 8 directional sprite movements for enemies. This makes them animate as if they are rotated in 3D space.
• Pick up items like door keys, treasure for points, ammo per gun type, or health items. There are 4 weapon types: Melee, handgun, shotgun and rifle. 
• Exit a stage by interacting with an exit switch, progress to a results screen, then move on to the next level. You will have to code the results screen yourself.
• Level structure: Game can be made into chapters, each chapter with its own subset of levels.
• Premade title screen, options menu, and credits screen. 
• Customisation in user interface like reticule, reticule color, screen overlays.
• A functional save/load system* (works for what's included in the template, will need to be expanded if you add more things to your game). Save system is designed so that you won't be able to save when enemies have you in their line of sight, forcing the player to move to safety first, to prevent soft-lock saving.
• Difficulty system: 3 difficulties are included that affect enemy reaction time and enemy damage.
• Full screen / Window mode option.
• Doors: Can be colored doors that require keys or just normal ones. Can also be secret doors. Doors can have vertical or horizontal orientation and can open up in 6 different directions (2 for each coordinate: x, y, and z). Basically doors open by sliding across the x-y plane or by going up or down on the z axis.
• Fog: if desired a shader can be used to create a fog effect often used in older games. Can be used to reduce draw distance, and helps to create a dark atmosphere. This is turned on by default.
• A simple screen filter system that uses Game Maker Studio's FX layer system to produce a pixelated look (making it look more like early 90's FPS games). This is also turned on by default.
• Tons of comments across all code. Pretty much everything is commented and explained to a high degree. 

*The save system will create a file on your pc that you can find when typing %LOCALAPPDATA% into the windows search bar.

You will find that by opening the template for the first time and simply pressing the "play" button, a full demo is already set up for you: A small "full" demo game with 3 chapters, each with 3 levels. 

My goal was to make a template that would make it extremely easy to create games in this style. A template that does all the heavy lifting for you when it comes to "old first person shooter" 3D stuff and movement, while also having a full game structure (with user interface, level structure,...) setup and ready to go. Keep in mind that making your own assets can still take a lot of time (like music, sprites,...). It's not just a simple system about transforming a 2D layer to a 3D level, it's a whole game structure.

The 2 ambient horror music tracks in this template are part of my horror ambient loops pack, made in FL Studio:

Horror Ambient Music Loops by EMI EMI GAMES

Controls: 

WASD = move

Mouse = aim, left mouse click = shoot

Backspace = pause / unpause

E = confirm

DELETE KEY = delete save file at the LOAD menu

What can this template not do? 

This is mainly meant to make games like Wolfenstein 3D, meaning games like the original Doom are a little too advanced for this template. Please keep this in mind when working with this template. 

Just like in the very first first person shooters, you get a floor layer, and the player can only stay on that elevation. A jump and "free aim" is included but are by default turned off since those are outside the scope of the style of game I was going for here. 

LEGAL:

After purchase you can make any commercial or non commercial game you want with this template, as long as you don't sell the template by itself. I would appreciate it if you credit me @EmiEmiGames

The human guard sprite was made by Paul Zarczynski and is at the time of making this itch page public domain (CCO license). The sprite art can be found here:

Human guard for Sprite Based FPS | OpenGameArt.org

Nmn | OpenGameArt.org

Feel free to check out my other works as well!

EMI EMI GAMES - itch.io