About Flixel

Flixel is an open source game-making library that is completely free for personal or commercial use. Written entirely in ActionScript 3 by Adam “Atomic” Saltsman, and designed to be used with free development tools, Flixel is easy to learn, extend and customize. Flixel has been used in hundreds of games, including IGF nominees, Adult Swim games, and avant-garde experiments. Many Flixel users make their first game ever in Flixel.


Flixel includes some basic features common to many game engines or other game libraries.

  • Display thousands of moving objects
  • Basic collisions between objects
  • Group objects together for simplicity
  • Easily generate and emit particles
  • Create game levels using tilemaps
  • Text display, save games, scrolling
  • Mouse & keyboard input
  • Math & color utilities

Flixel also includes some new "advanced" features, which we'll explore in more detail on the features page.

  • Record and play back replays
  • Powerful interactive debugger
  • Camera system for split screen
  • Pathfinding and following
  • Easy object recycling


Adam started working on Flixel in March of 2008, and released the first public version in June 2009. Probably the most commonly asked question about Flixel is "where did it come from?" so we've included a short explanation here.

“I tried a few different times to make a little game engine type thing that would allow me to make retro games. That just seemed like a fun thing to be able to do for fun on a weekend. I tried it in C++/Python/OpenGL right when I left school, maybe 7 years ago? Anyways, it was a failure. Once ActionScript 3 came out, I was able to do some of the pixel-level stuff that I was really interested in. However, by the time I got my hands on AS3, I was more interested in just making little games, and seeing what patterns evolved. I kept making more complex games by reusing the code from the last project, and eventually those parts that I was seeing in every project got moved to their own folder. I think a lot of coders out there have a folder like this on their hard drive somewhere.”


Flixel simply could not be what it is today without help, support and inspiration from a lot of fantastic people. Starting with v2.50, we have relied more on the kindness of strangers than ever before, starting with our awesome all-volunteer web team:

Special Thanks

Rebekah Saltsman puts up with a lot of crap, and without her patience there would not be any Flixel. Paul Veer painted the images on the index and 404 pages, as well as the background tile for this site. Ivan Safrin (F*ck Typing, Bitworld) taught Adam to write Flash games years ago, a pretty big moment in retrospect. A lot of Flixel forum members have caught bugs or contributed great snippets of code, too many people to list here. You’re all awesome. Finally, a big thank you to the indie games community at large, who have been so supportive and helpful and inspiring over the years.

Image RSS Feed Screens
Dot-Matrix Shooter by FriedPixel Games Zandaka Senran by Gold_Ninja Mode by Adam Atomic
Post article RSS Feed Related Articles

Alpha 03 is here! Click right there! CLICK IT NOW.Changes from Alpha 2 include individual sounds for each bullet type, sounds when an enemy is hit, sounds when the flash b-you know what, sounds. There's a lot of sounds now. There's also a jobs tab on the map screen, which shows all current Jobs the player has. At present, they involve murdering things to or from places.Oh, also there's map coordinates. So you can tell which planets you have to go to murder things.

Screens 'n' things from FST Alpha 3!

Also Cooldown.The largest change is, quite possibly, the collision detection change. You may be able to spot it in that above image, but the ship core (those four white pixels in the center,) is partially obscured. The core must now be COMPLETELY COVERED in order for a hit to count. Have fun just barely scraping by!The second largest change is bullets and how they're rendered. Your bullets are bigger, and everybody's bullets are more chunky when rotated. Partial transparency is for suckers.

Screens 'n' things from FST Alpha 3!Screens 'n' things from FST Alpha 3!Screens 'n' things from FST Alpha 3!

What's the best bet for the next build?

  • Combat adjustments! I have to change up how enemy movement is handled, because variety is a good thing. This may also include changing how enemies are generated. All of this is old code, and is therefore a MASSIVE PROJECT.
  • MORE GUNS! I might end up re-writing bullet logic too, because homing bullets and weird motion patterns are awesome.

I make no promises, other than it will be (more) awesome.

March 2015 - You Can Simply Smell The Fresh Paint
Super Matt Jordan

March 2015 - You Can Simply Smell The Fresh Paint

6 months ago Super Matt Jordan 1 comment

It's been a while so I made a video instead of writing a long article.

FlyShootTrade Alpha.02 Out!

FlyShootTrade Alpha.02 Out!

8 months ago FlyShootTrade 0 comments

Space-tradin' shmup RPG's second actual update brings copilots, the framework for quests, and a (mostly) new UI!

Introducing -- Centuple Trouble!
Centuple Trouble

Introducing -- Centuple Trouble!

11 months ago Centuple Trouble 0 comments

In Centuple Trouble, a puzzle-platformer currently in development, you assume the role of a kid searching for his 100 baby cousins (the centuplets). Bop...

ZombieRun - retro local multiplayer awesomness will be released for Halloween

ZombieRun - retro local multiplayer awesomness will be released for Halloween

11 months ago News 0 comments

ZombeRun, the retro local multiplayer platformer is coming on October 29th. ZombieRun has been in development for 2 years and is now ready to take the...

Add game Games


3 weeks ago Released Nov 27, 2013 Adventure

The last thing you remember is receiving an unsatisfying answer. A plunge through the fundamental chaos takes you to a place of bones. Great power can...

Box Cooperation 2

Box Cooperation 2

1 month ago Released Sep 6, 2015 Puzzle Compilation

Box Cooperation 2 is a classic puzzle game in which you have to cooperate with a player-controlled crate in order to make the yellow block touch the green...

Super Matt Jordan

Super Matt Jordan

1 month ago TBD Platformer

Super Matt Jordan is about a real person with real people in a fictional setting and story. Some of the events in the game are inspired by real experiences...

Aeon Rivals

Aeon Rivals

1 month ago Released Jun 15, 2014 Fighting

Welcome to Aeon Rivals, a free 2D online multiplayer co-op game. Team up with friends, select from an expanding cast of characters and duke it out against...



5 months ago TBD Arcade

FlyShootTrade is a Shmup RPG where the player fires procedurally generated weapons at procedurally generated enemies in procedurally generated levels...

Hero Generations

Hero Generations

6 months ago Released Apr 10, 2015 Roguelike

An innovative roguelike/4X strategy game where every turn is one year of your life. Explore, find a mate, build a home, and raise a child before you die...



6 months ago Released Dec 10, 2014 Adventure

Skullz is a trippy adventure game, quite unlike anything you've ever seen, probably.

Lost Moon

Lost Moon

7 months ago Released May 5, 2015 Platformer

This is a platform game in retro style based on Metroid that challenges you with puzzles, upgrades and action.

Pixel Flight

Pixel Flight

7 months ago Released Nov 12, 2014 Arcade

Venturing into deep space, surrounded by treacherous obstacles, you must guide your ship out of the formidable zones towards safety. As you progress you...

Cube and Me

Cube and Me

9 months ago TBD Real Time Strategy

Cube and Me is a unique pet simulator with a mixture of RPG, RTS, and "roguelite" elements. You play as Lyle Dyson, an ordinary 18-year-old man who barely...

Post comment Comments
Guest Apr 21 2014 says:

does this work on windows 8

+1 vote     reply to comment
Guest Oct 5 2013 says:

I don't know if there's a better way to communicate this, but Flixel does not have a commercial license! Flixel uses the MIT License - you can see it in license.txt if you download the source.

+1 vote     reply to comment
Post a Comment
click to sign in

You are not logged in, your comment will be anonymous unless you join the community today (totally free - or sign in with your social account on the right) which we encourage all contributors to do.

2000 characters limit; HTML formatting and smileys are not supported - text only

Flixel dev team
Send Message
Official Page
Release Date
Released 2011
Engine Watch
Track this engine
Community Rating



0 votes submitted.

You Say


Ratings closed.


Latest tweets from @adamatomic

RT @MonsieurEureka: the Tearaway world is one of my favourite game world, in the world. T.co

1hour 23mins ago

cc @damousey @dislekcia and i always forget marc's handle dangit T.co

1hour 23mins ago

RT @GregRicey: Playing Secret Legend @DoubleFine today! Such a lovey game making for lots of happy smiley faces. @dicey T.co

3hours 52mins ago

T.co via @ivansafrin T.co

3hours 52mins ago

RT @lexaloffle: Playing with J-Fry's terrain renderer: 32^2 heightmaps w/ cam/lighting/filter controls T.co #pico8 http:/…

4hours 5mins ago

AH HA! the secret sauce!! if you stare long enough into the abyss... T.co

4hours 47mins ago

(btw i appreciate all the clever advice about goofy-ass NS literals but that only works for constants, not actual C int variables)

4hours 57mins ago

how to make an array of integers in ObjectiveC not trolling, this is actually how it's done T.co

5hours 6mins ago

i'm glad the new XCode beta is so stable. if it was shitting the bed every 5 minutes it would be a lot harder TO GET ANY GOD DAMN THING DONE

6hours 11mins ago

RT @AkiraComplex: T.co

6hours 15mins ago

Embed Buttons

Promote Flixel on your homepage or blog by selecting a button and using the embed code provided (more).

Flixel Flixel
98 of 746
Last Update
1 month ago
30 members