RexEngine for Unity: 2D Games Made Easy

RexEngine is a tool for making pixel-perfect 2D games in Unity! It’s been designed from the ground up to let you create your game as quickly as possible, with as little fuss as possible!

Click here to play a demo of RexEngine!

The core of RexEngine is a custom 2D physics engine which focuses on flawless precision. It takes its inspiration from the classic games of the 8 and 16-bit eras, when physics were 100% stable, digital, and videogamey. RexEngine doesn’t simply work: it feels amazing while doing it.

Beyond the physics, RexEngine gives you access to a huge variety of character mechanics and abilities. You can make both the player and the enemies move, jump, climb, use attacks, and much more — all with the press of a button! After all, the classic games are classics for a reason, and they’ve been around for ages; why should you have to reinvent the wheel every time you make a game that uses them?

Rex Engine: 2D Games made Easy

RexEngine doesn’t just do the basics, either. It’s not afraid to roll up its metaphorical sleeves and help you with the nitty-gritty advanced stuff: you can alter or even reverse gravity, make the player or enemies take multiple types of damage including damage-over-time (heya poison!), and feel like a superhero by spiking bullets back at your foes.


What Makes RexEngine Awesome?

We Can Barely Fit Everything in This Box!

Pixel-Perfect Physics!

Tight, responsive, pixel-perfect 2D physics, including flawless sloped terrain! Beyond simply working, RexEngine’s physics have been exhaustively fine-tuned to provide that classic feel.

Classic Game Mechanics!

Run, jump, swim, and even fly!. Create characters that play like a myriad of classic game heroes! JetEngine lets you make games in the style of Mario, Mega Man, Castlevania, and everything in-between! You can even give enemies all the same abilities you can give player characters!




Attacks Galore!

Shoot projectiles, swing melee weapons, bounce on enemies, and even reflect bullets!



Powerful Inspector Features!

Quickly and easily adjust core character stats like velocity, acceleration, and jump height. Go in-depth and tweak mechanics to your exact specifications! Want a dash-jump that retains its momentum when you jump and lets you initiate it in the air? Make it happen right from the Inspector!


Hot-Swap Entire Character Movesets on The Fly!

Give actors unique properties and animation sets for land, sea, and air movement, and toggle between them instantly with the push of a button! Want a character to play completely differently in the water? In the air? In any other circumstance you’ve invented? Consider it done!


Control Gravity!

Want moon physics, unique water physics, or even reverse gravity? RexEngine does crazy stuff like that! You can even make characters that flip their gravity when they jump, VVVVVV-style!


Crunchy Effects!

Spice up your game feel with hit sparks, screen shake, sprite flash, sprite jitter, and more! RexEngine doesn’t just function — it FEELS good!

Endlessly Extendable!

RexEngine is carefully documented and has clean, commented code. You can use it as a foundation to build on, or even mix-and-match only the pieces you want to use. Just want to use the physics? Want to add your own mechanics? RexEngine has you covered.

Assemble Full Games!

RexEngine includes tools to put levels together, tie them in with additional scenes like the title and ending scenes, and add vital features like checkpoints and level-complete markers. It’s the whole package!

Sounds Amazing. Where Do I Buy It?

Click to buy RexEngine