I'm Nick Marmaras.

UE5 Ratchet: Deadlocked Dreadzone Station Demo

In this video, I'm showcasing my Unreal Engine 5 demo(developed in 7 days) of Ratchet Deadlocked, the classic PlayStation 2 game developed by Insomniac Games. As a fan of the game, I wanted to recreate its world and gameplay in UE5, and I'm excited to share the dreadzone station, and the arena in it.

• Character basic animations and more complex animations(triple attack, jump attack, double jump, strafing with weapon)
• Familiar sounds from the game(soundtracks, and sound effects)
• Dynamic map more realistic
• Teleporting effect(deadzoze, to the arena)
• Weapons vendor with interaction from the real game
• Secondary characters(clank, Big Al, custom boss )
• Dynamic UI's such as weapons equiped, ranking status
• Niagara system
• Real time cameras showing ratchets moves from the game and realistic lcd displays for textures
• Boss AI

• Unreal Engine 5

• Branding
• Unreal Engine 5

Ticket To Ride Card Game

Implementation of a 2D game "Ticket To Ride Card Game" in the framework of a core course of the Department of Computer Science.

• Implementation based on pronunciation
• 2 player interaction with turn switching
• Collect points through regular and special cards through a board
• Save game and load game
• Move cards in the GUI to various positions

• Java 8
• Java Swing

• Branding
• Java Programming Language

Alpha Programming Language

Lexicographic analysis, regular expressions, rational and non-rational automata, lexical analyzer construction methods, lexical analyzer generators. Building a complete compiler using Lex and Yacc type tools, building the virtual machine, building library functions.

• Alpha Programming Language, Flex, Yacc, Compilers, C Language

Super Mario Bros(1985)

Implementation of a 2D game "Super Mario Bros 1985" in the framework of an elective course of the Department of Computer Science.

• Implementation based on pronunciation
• Tile-based game
• Collision Detection
• Implementation of character movements through Sprites
• Sprites based on small, Big, Indestructible Mario
• Implementation of bonus room
• Presentation of a game to a teacher supervisor and fellow students

• C++
• Allegro

• C++, Allegro

Unreal Engine 4 Survival Horror Game

• Presentation of personal idea and game scenario to a supervising professor
• Designing game requirements
• Implementation using Unreal Engine and C++ (3D Game)

Technologies:

• Building architecture according to blueprints (3 floors)
• First Person View (FPV) character
• Adding features via C++ (lens for use by the character)
• Implementation of mini games depending on user interaction

• Unreal Engine 4, C++, Designer, Director, Developer, Scenario

Data Analysis on R

• Preprocessing Datasets
• Normalization of the Datasets
• Exploratory analysis for each decease dataset with PCA plots
• 2 Different analysis for each individual

• R Programming Language

Client Server in Python

Lexicographic analysis, regular expressions, rational and non-rational automata, lexical analyzer construction methods, lexical analyzer generators. Building a complete compiler using Lex and Yacc type tools, building the virtual machine, building library functions.

• Alpha Programming Language, Flex, Yacc, Compilers, C Language

Social Network

• HTML, CSS3
• DOM manipulation, openstreet maps & geocode and HTML5 geolocation, Ajax Requests
• Sign up and Sign in User implementations
• REST API, implementation of posts for each user, usage of GIT
• JQuery and Javasript usage, Servlets

• HTML, CSS3, Javascript, JQuery, Servlets, REST API, Git

Ratchet & Clank: Giant Clank Battle in UE5 VR Prototype

A prototype developed in Unreal Engine 5 with the implementation of destroying buildings with missiles or super attack. Implemented with directional gravity and unlit materials for maximum performance in VR. The jump is experimental, so the options menu.

• VR Oculus Quest 2
• VR XR Elite
• Directional Gravity
• Unlit materials

• Unreal Engine 5

PyGame Justice League Fighting 2D

Implemented in Pygame, with sprites and collisions. Support for single player, multiplayer and online multiplayer.

• PyGame
• Sprites
• Collision
• Multiplayer

• Python 3
• Pygame

PyGame Doom - Wolfenstein

Implemented in Pygame, with sprites and collisions. Support for single player, multiplayer and online multiplayer.

• PyGame
• Sprites
• Raycasting
• Multiplayer

• Python 3
• Pygame

JARVRICKS

Introducing JARVRIKS(Just Another Robust Virtual Reality Inverse Kinematics Solution), developed in Unity for full body tracking using Vive XR Elite headset and 2 of Vive Ultimate Trackers. Multithreaded Inverse Kinematics using C# Graphics Job, including build in uniform calibration method and VR IK Editor for directly manipulating the effector's values on runtime.Single component for manipulating each effector's properties on Editor mode.Developed 3 use cases, 2 for the upper body and one for the lower body. The first is a Superhot replica, the second a BeatSaber replica and the third one is a classic soccer game.

• Inverse Kinematics
• Multihtreading
• C# Graphics Job
• VR IK Editor

• Unity
• HTC
• HTC Vive Ultimate Trackers
• HTC XR Elite

Zombie Survival

Survive the zombie apocalypse in this immersive shooter game! As a skilled marksman, you must fend off hordes of undead that are coming your way. With stunning graphics powered by Unity's HDRP and cinemachine effects, the game transports you to a post-apocalyptic world where survival is the only goal. Put your shooting skills to the test and see if you have what it takes to survive against relentless waves of zombies. Do you have the courage to stand your ground and become the last hope for humanity? Download the game now and find out!

• HDRP
• Survival

• Unity
• First Person Shooter

NPC Game

The game was built in Unity 2021.3.15f1. For the purpose of convenience, it became an import model of New York, respectively the enemy from Mixamo and a drone as a companion. The companion NPC designed has 4 states (functionalities)

• Idle mode-> spins around the player when the player is also not moving, at a random point
• Follow mode-> when the player moves, the drone follows the player from the last point it was before
• Attack Mode-> launch various particles when the closest enemy is within the attack radius
• Health PickUp mode-> by pressing the L button of the keyboard, the drone goes to the nearest healthpack, collects it and follows the player again.

• Unity
• First Person Shooter

Google Cardboard game

Designed for mobile devices with the power of Google XR Cardboard, this app was designed to run on mobile playing an infinite runner game. You can obtain points, avoid obstacles based on the movement of your smartphome, and additionaly jump with additional movement. The game also supports a variety of mobile devices.

• Infinite Runner
• Survival

• Unity
• Google

Sly Cooper Unreal Engine 5.5 Prototype

In this project, I've recreated some of the key gameplay features from the classic game, showcasing the character's animations, mechanics, and world-building due to 20 years of Sly Cooper Anniversary. Sly's Basic Animations: Sly performs smooth animations such as walking, jumping, and more. Rope Walking: A recreation of the iconic rope walking mechanic from the original game. Barrel Breaking: Experience the action of breaking barrels, with clusters of items dropping. Health System: A functional health system with visual feedback for player health. Climbing Ropes: Implemented rope climbing mechanic to navigate the environment. Binocular Mode: Includes a zoom-in and zoom-out feature with animated character interactions for exploring the environment. Jumping Tents: Sly can jump through tents just like in the original game. Collision System: A robust collision system to ensure smooth character movement and interactions. Real-Time Water Simulation: Realistic water effects and interactions with the environment. Paris Map: The map of Paris recreated to match the game world.

• Platformer
• PS2

• Unreal Engine 5
• Playstation

Hellas Logo Quiz

Hellas Logo Quiz is the ultimate test of your knowledge of iconic Greek brands, companies, and products! With hundreds of logos across multiple categories like food, tech, retail, and more, this fun and educational quiz game will keep you entertained for hours. Unlock stages as you correctly identify logos, improve your memory, and challenge yourself to complete each stage by guessing the names of Greece’s most famous logos. From everyday brands to local specialties, how well do you know Greece’s corporate and cultural landscape?

• Logo Quiz
• Logo
• Puzzle

• Unity
• Android

Armor Of God

A World Caught Between Light and Shadow In an age where faith has become a fortress, and salvation is a weapon, the world of Armor of God stands at the brink of oblivion. Here, sacred cathedrals crumble under the weight of unspoken sins, cursed forests whisper with ancient secrets, and villages wear the faces of the damned. You are Sir Caelum Darion, a fallen Templar cast out by those who once praised him. Stripped of rank and honor, you wander a world where truth is a blade — and deceit is a mask worn by monsters. Guided by a whispered prophecy and a fragment of divine power, you seek the scattered pieces of the Armor of God — a relic of unimaginable might, now divided and hidden across haunted lands. But not all that is holy is pure. Not all that is light is salvation.

• Armor Of God
• Single Player

• Unreal Engine
• PC

Marmatrix

Marmatrix is a lightweight, modern OpenGL engine focused on clarity and rapid iteration. It pairs a clean C++17 codebase with GLFW for windowing/input, GLAD for loading, GLM for math, stb_image for textures, and Dear ImGui for live tooling. The goals are:

• a minimal, readable rendering loop (model–view–projection done right),
• practical building blocks (camera, chunked worlds, meshes, textures),
• immediate-feedback tools (debug overlay, menu, hot-reload ready),
• and a foundation you can extend toward voxel worlds, lighting, PBR, instancing, and ECS.

• OpenGL
• GLFW
• Glad
• C++