Aeon Rivals — Free-to-Play 2D MMO!

Welcome to Aeon Rivals, a free 2D side-scroller MMO for Windows and Mac. Team up with friends, select from an expanding cast of characters and duke it out against invading Celestian monsters. You’ll have to stay on guard if you want to take these beasts down!

Celestians are invading Earth2, the home planet of many innocent lifeforms. As a member of the Aeon Rivals, your job is to stop the destruction of Earth2 before the damages become irreparable.

While Aeon Rivals is a 100% free 2D MMO, we have a strong stance against pay-to-win schemes. All our extra features offered will never give players unfair gameplay advantages. Our goal is to keep the playing field as level as possible so it stays skill-based and enjoyable for everyone.

Download For Free!Create Account

Want more costumes and other exclusive content?
Join Club Aeon, which also helps support PRIZZA, the game creator who has been developing this game for years on his own.

Feel free to stop by Discord for the chance to discuss the game with PRIZZA and other Aeon Guild members.


Update [1.8.8]



It’s Aeon Rival’s 4th anniversary! We’re celebrating with a new update that includes party hats, a new Natural Gift for KeRobo, big performance improvements and cake!

For the rest of this week all Club Aeon memberships are on sale, too. Just use checkout code LETSPARTY to receive a discount at checkout.

While delving into bug fixes for the previous Egg Quest event, I noticed a design problem with how event data and scoring is read in and cleared every month. I rewrote a portion of the code to help iron out issues. I’ve also made a few adjustments to gameplay in this release.

I was working with some GPU code and I implemented a couple of big performance boosters. You may even feel a difference in your FPS!

4th Anniversary

Players can now wear party hats with Flavor “Celebrate”. The Victory Cafe is also serving cake that gives some pretty useful stat boosts. More info »

Check the changelog below for a list of changes.

Enjoy Aeon Rivals? Join Club Aeon! You'll get lots of cool stuff and directly support game development.


General Changes
  • “Celebrate” Flavor.
  • Anniversary Cake Cafe item.
  • “Invisible wall” causing players to stop moving when traveling over slope edges. Score and event data code may read in old data (Thanks, mint).
  • Collecting eggs after leaving a battle may cause some eggs to become uncollectible. (Thanks, Slycat)
  • May not be able to pick up Golden Egg if quest has been completed.
  • Player would stop moving during Terror if chat was activated.
  • infoBot’s exit gateway message sometimes incorrect.
  • Players popped up into the air can
  • Tiling issue calling null tile to be drawn
  • Adjusted battle score formula to scale with Celestian’s max HP.
  • Beast health formula adjusted. Normal difficulty Beasts have slightly more health, while higher difficulty Beasts have much less sponginess.
  • Pretty big performance boosts!
  • infoBot won’t display New Event popup if user already has collected one or more event items. (Thanks, mint)
  • Golden eggs in Egg Quest are slightly more common.
  • “Dread” Mental State guard break reduction increased, stacks with Anniverssary cake effects.
  • New score update method, freeing up memory for server and client.
  • Some effects cleared on logout.
  • Minor performance improvements.
  • Minor object placement changes.
Character Changes
  • Champ’s Hallow 2017 costume miscoloring.
  • KeRobo has Natural GIft「Tailpo Command」which allows KeRobo to hand off partial control to the tailpo on its back.
  • Luck Monkey’s「Network Transfer」cooldown redcued (10s -> 9s)
  • Müja’s「Dulcet Chime」Prime can now clear the Terror Mental Status, Calming other players. (Thanks, Seedlings)
Celestian Changes
  • All Beast flinch thresholds raised.
  • Beast’s poison effect makes sound.



4th Anniversary Event

June 15th is the official birthday of the town of Aeon (and Aeon Rivals!). Help us celebrate our 5th Anniversary from June 15th – June 24th!

“Celebrate” Flavor

All players can celebrate by donning party hats for the duration of the event!* Characters will also toss confetti when blocking an attack or taking damage.

This new costume can be accessed with the Flavor code celebrate. Click here for more information on Flavors.

Anniversary Cake

Sigurd has baked a special cake for the celebration. Grab a slice from the Victory Café and experience +10% Attack and increased resistance against Guard Break.

*After the event has ended, Club Aeon members will still have access to the Celebrate costume.


Top Players (May 2018)

🎉Congrats to Slycat for grabbing 1st place this May, earning 312 points. Thanks for your hard work!🎉

# Name Victory Points
Click "More" below to view all rankings...

Top Players (April 2018)

🎉Congrats to Seedlings for earning 1st place for April, scoring 818 points. They’ve started a two month streak!🎉

# Name Victory Points
Click "More" below to view all rankings...

Update [1.8.7]



Happy Spring. Thanks to everyone who participated in the Lucky 7 event. This update introduces the all new Egg Quest event and also introduces a brand new V-Keys system, bug fixes and more improvements.

Egg Quest

Hunt for eggs hidden around town! The local Beasts are attracted to them and steal (or even eat) them, so you’ll probably need to defeat Beasts to find the eggs. The X-Bulletin is rewarding Wake-Up Emitters and Acolyte Beast Eggs as rewards more than usual this month, too. More info »

Check the changelog below for a list of changes.

Enjoy Aeon Rivals? Join Club Aeon! You'll get lots of cool stuff and directly support game development.


General Changes
  • Egg Quest event.
  • Reimagined V-Keys (virtual keys) for much easier accessibility and control.
  • Celestians having trouble jumping when colliding with walls. (Thanks, Seedlings!)
  • Pink Bons have finally left the area.
  • Users can no longer force old sessions to logout.
  • Minor behind-the-scenes game tweaks and restructuring.
  • Small performance and memory usage improvements.
Character Changes
  • N/A
Celestian Changes
  • N/A


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