CS50

In CS50 2D’s final lecture, explore the core mechanics and programming concepts behind Pokémon-inspired RPGs, including state stacks, GUI design, and turn-based battle systems. To take the course for a certificate, register at cs50.edx.org/2d. youtu.be/pdBhw2QirRI

This is Lecture 6 of CS50 2D — explore how Box2D physics powers Angry Birds-style gameplay with dynamic bodies, collisions, joints, and trajectory simulation in Love2D for mobile games. To take the course for a certificate, register at cs50.edx.org/2d. youtu.be/Wh5cDuJFHz8

This is Lecture 5 of CS50 2D — recreate the classic Legend of Zelda game mechanics, dungeon generation, hitbox design, screen scrolling, and data-driven game development. To take the course for a certificate, register at cs50.edx.org/2d. youtu.be/iwjilbptPF

This is Lecture 4 of CS50 2D, in which you’ll learn how to build a Super Mario-style platformer with tile maps, animations, procedural level generation, collision detection, entities, and game objects in Lua. To take the course for a certificate, register at cs50.edx.org/2d.

This is Lecture 3 of CS50 2D — explore how to build a smooth & engaging Match-3 game using tile grids, tweening, timers, and color palettes for fluid gameplay and polished visuals. To take the course for a certificate, register at cs50.edx.org/2d. youtu.be/Qxh0KheWftU

This is Lecture 2 of CS50 2D — learn how to build a classic Breakout game with sprite sheets, collision detection, procedural level generation, particle systems, game states, and persistent high scores. To take the course for a certificate, register at cs50.edx.org/2d. youtu.be/TgZBoMRKSzk

This is Lecture 1 of CS50 2D — learn how to recreate the iconic Flappy Bird game using sprites, parallax scrolling, procedural pipe generation, collision detection, state machines, and input handling. To take the course for a certificate, register at cs50.edx.org/2d. youtu.be/2rboPz0plD8

This is CS50 2D’s very first lecture on Pong — learn 2D game development fundamentals using Lua and Love2D, covering game loops, input, collision, OOP, states, and sound integration. To take the course for a certificate, register at cs50.edx.org/2d. youtu.be/MY2y3dDwgMk

CS50 is launching a new-and-improved course — CS50’s Introduction to 2D Game Development, or simply CS50 2D! This course, previously known as CS50 Games, picks up where CS50x leaves off and lets you explore the design and mechanics of such childhood games as Pong, Flappy Bird, Breakout, Match 3, Super Mario Bros., Legend of Zelda, Angry Birds, and Pokémon in a quest to understand how video games more broadly are implemented. The lectures will air on YouTube every day, starting on Tuesday, April 21, at 9am EDT. To take the course for a certificate, register at cs50.edx.org/2d. And for now — a word of introduction from Professor @davidjmalan and CS50’s own Colton Ogden! youtu.be/4oaN94oOdTM

Congrats to everyone who took part in this year’s CS50x Puzzle Day. 🧩 Here are the stats! Which puzzle was your favorite? Check out the solutions and memes at cs50.ly/puzzle-day-2026.

Missed the live CS50 Tech Talk about the present and the future of editing documents, and the role AI plays in it, led by Nick Bernal of superdoc.dev? Not to worry - watch it now on YouTube. youtu.be/FqB_4QY6x6g

What was your favorite lecture from CS50 for Business? Comment below. 👇 The entire course is available on YouTube for free at cs50.ly/business. To take this course for a certificate, register at cs50.edx.org/business.

This Friday, April 3, join CS50 for a Tech Talk on why you’re still better than AI at editing documents, led by Nick Bernal of SuperDoc.dev, starting at 1pm EDT. Register for Zoom at cs50.zoom.us/meeting/regist….

Have you started CS50 for Business yet? This newest course from CS50 covers a broad range of topics, from algorithms and data structures to artificial intelligence (AI), perfect for decision-makers of today and tomorrow. The entire course is available on YouTube for free at cs50.ly/business. To take this course for a certificate, register at cs50.edx.org/business.

Can you solve ‘BananAnagrams’ from last year’s CS50x Puzzle Day? For an interactive spreadsheet version of the puzzle, visit tinyurl.com/banananagrams. See cs50.ly/puzzle-day-2025 for the solution. Register for this year’s Puzzle Day at cs50.ly/register.

Can you solve ‘Books’ from CS50x Puzzle Day 2024? See cs50.ly/puzzle-day-2024 for the solution. Register for this year’s Puzzle Day at cs50.ly/register.

Can you solve ‘Around the World’ from last year’s Puzzle Day? See cs50.ly/puzzle-day-2025 for the solution. Register for this year’s Puzzle Day at cs50.ly/register.

This is Lecture 8 (the last!) of CS50 for Business on Securing Systems. Learn how to secure systems with strong passwords, encryption, two-factor authentication, and best practices to protect your data from cyber threats and hackers. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/9KoYnFuHYL8

This is Lecture 7 of CS50 for Business on Deploying Databases. Learn how to deploy and manage databases at scale with SQL and noSQL, including best practices for efficient data storage and querying. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/OZE2t3-M0ps