Announcing: "Portalethium"


The CG Cookie Crew is proud to present our tower defense game, PORTALETHIUM! Gridlocked at the intersection of two worlds, you - the valiant forces of blue - must protect your portal against the evil forces of orange

To save your portal is to save your planet!


 One Game, Two Purposes

We built PORTALETHIUM to be played.


Please play it and enjoy it! It’s an endless-style game that we hope will supply you with hours of beat-your-high-score incentive.The Goal?  Simple. You’re on the defense. Prevent enemies from making it to your portal for as long as you possible can.How?  This part is simple in concept but tricky to perfect. 

You have an arsenal of 3 TURRETS to ward off your enemy:


Canon : As a base turret, this weapon fires a slow-but-steady round at short-range enemies. It may not seem like much, but it can save your bacon when you don’t have many credits to spend.


Gatling : This weapon has a bigger range than the canon and a higher rate of fire. But those enhancements come at a higher cost of your credits.


Missile Launcher : She’s the most expensive turret with the biggest range and firepower. But the catch is she only fires flying drones, not land enemies.  


3 different enemy types are constantly making a break for your portal:


Moto: These two-wheeled blue buggers are your fastest enemy. Yet they are also your weakest foe. You'll have to act quickly to take down them down, but you won't need much firepower to do so.


Tank: These green juggernauts are the slowest of the enemy hoard. But what they lack in speed they make up for in armor. You'll need plenty of time, cannons, and gatlings to ward off tanks.


Drone: What's that in the sky? It's a bird it's a plane it's a...cliché example! The purple drones are the only airborne enemy and thus can only be engaged by your missile launchers. It can be easy to forget to look in the sky but, for the love of your home planet, don't! Lest the drones quietly rob you of victory.

We also built PORTALETHIUM to teach.

We thought it would be really cool to build a fully playable game and then turn around and teach how to make it! The “Creating a Tower Defense Game” Learning Flow will teach you how to build your own game from the ground up.

  • Building assets with Blender : Game assets don’t grow on trees. Someone has to build them. Why not you?! In this 20-lesson course I will teach you all the ins-and-outs of modeling and texturing modular assets for exporting to Unity.
  • Level design in Unity : In this course, Jonathan Lampel gives a crash course in using your modular Blender assets to build a playable level inside Unity.
  • Game development with Unity : Finally, Jonathan Gonzalez takes all the ingredients of this tower defense recipe and turns it into a playable game!
All 3 courses are available in the "Creating a Tower Defense Game" Learning Flow. Check it out HERE!

All said and done, this has been a huge team effort to make Portalethium a fun, educational reality. We’re talking 1 fully-playable game, 1 Learning Flow, 3 courses, 56 video lessons. It’s a big experience and we're eager for you to be a part of it!

Please screen shot your high score and post it to our Facebook and/or Twitter with #portalethium

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  • Mark Smith (me1958424)

    way cool!!

  • jsimmons

    That's awesome!

  • c0mpletionist

    Excited to start learning more things!

  • Omar Domenech (dostovel)

    Congratulations to all in the CG Cookie team!

    Looking forward to the lessons just so I can make my own version where is hipsters trying to make it to Starbucks for some coffee. ;)

  • crew
    Kent Trammell (theluthier)

    Hahaha that's a great idea! Though isn't it very un-hipster to go to starbucks? Maybe hipster-cred varies from place.

  • Geoff Gerber (markemp)

    Can't wait for the tutorials! Very excited, and congrats!

  • Omar Domenech (dostovel)

    Slight variation after some googling, "Hipsters cant afford their lifestyle" So it's Hipsters trying to make it to the Apple store, but for copyright reasons the logo will be an apple with two bites.

    Thanks for keeping me up to date Kent.

  • crew
    Kent Trammell (theluthier)

    Thanks, Geoff! I think you'll really enjoy the tutorials.

  • knuckelhead

    This is really great. I have been waiting for this to come out so I can use it to make a prototype one day of a board game. I am really interested int eh modeling section right now though cant wait.

  • Geoff Gerber (markemp)

    I want to share my score on Twitter as instructed, but can't find any "share on Twitter" buttons. Is that not in the game?

    Some social media plug-ins would be pretty cool to implement as well. :)

  • John Sanderson (procyonlotor)

    It's a Christmas miracle!! Thanks guys! I'm excited for this one.

  • Kyle Blaine (arcangel_zero7)

    Can't wait! This is the exact flow I've always been waiting for! I'm eager for the blender-to-asset workflow to be totally demystified. :D

  • Cy Sean (xyxspliffy)

    hah :D that was fun.. I accidentally blocked one of the paths where I placed all my guns and they got rerouted to where it was defenseless :( I noticed some of the guns I placed (just outside the spawn point) weren't shooting the targets.

    The explosion and the sound effect was from the space shooter game right? :D

  • anthonycoi

    I can't wait to learn this course :)

  • lundeful

    Level 31!

  • fuzzyeuclid

    Looks good! Fun game. One thing I would like to point out is the odd missile tower behavior: missile tower on one side of the map faces the proper enemy, but when it fires, it's missile veers off to another missile tower's target across the map - hardly in range of it's sensor let alone useful when attempting to defend my planet :)

  • scdelf

    Level 68! :)

  • Jonathan Allen (jt_allen)

    He he, I got a Creative Media Sustainability Business in mind with all this knowledge and training you guys offer. This game and the flows involved are going to make it a reality. All the modern developments in technology are really fascinating. I may be able to pull this business idea off with a max of 150 people or less for my future small business. I am so happy to have come across CGCookie!

  • crew
    Wes Burke (wesburke)

    Probably hand-me-down anti-air units from the Zerg... or we realized In the script it was shooting out the missile first before designating which target it would be firing it. :( Updated build should have this fixed! :)

  • Jonathan Fisher (jfishe25)

    Very cool.

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