Fyi, for others with the 405M following along with this video, you need to hit the HOME button to confirm erasing user data, instead of the back button (for the 505).

congratulations my anbernic rg505 arrived and i did the same as your video, everything worked...thanks

Thank you for this guide. None before come close to how easy this was with yours. A few moments I had to question but overall 95% perfect. GAMMA IS BUSSIN

Excellent guide. Followed it to a tee and it worked perfectly. Thanks!

Thanks for writing this guide! Very easy to follow! :)

Working for me! Thank you for your step by step help!

I want GammaOS on the Ayn Odin. I would be interested to see what all that extra head room could do for emulation. Also I would be interested to see what the battery life would be too. A man can dream I suppose.

I hope they get GammaOS on the Powkiddy X28 too. The X28 REALLY needs it.

Just got it so easy a baby could do it appreciate u bro

It worked! Tks man, you helped a lot.

Wake up honey, new retro tech daddy! (I might need to pick up a 505 again, battery life gains are INSANE 😆) stubbz

great to see the community developing third party oses

Would the rg505 be considered better than the RP3+ with Gamma OS or does the RP3+ still considered better. Which one has tge better build quality as well? There was a lot of talk about the RP3+ having faulty hardware.

great video! im sick of anbernics "updates" which break more than fix. l2/r2 even worse after the last "update" will swap imediately

I'm hoping ANBERNIC ships the 405V with GammaOS installed as the stock firmware!

Great turorial. Thanks man!

I just ordered my 505 couple days ago this is way over my head I sure hope I don't have to worry about it and I can just played the games😅

[SOLVED] I moved forward restarting the fastbooter. Then I realized I was trying to install RG405m gamma OS, instead of the RG505. Using the right install solved all my issues. Greetings. I went through the process and my Anbernic Bricked. Then I ran the unbricker and I restored to original OS, and I tried running the process but now it is unsuccessful. Do you guys know if there are any forums where I could get support? The "Spreadtrum / Unisoc Bootloader Unlock Tool" connect but freezes/does not prompt the data erasure/press back button part. And I thought, maybe it is flash still, so I tried running "fastboot reboot fastboot", but adb keeps "waiting for any device"; it is odd because I ran "adb devices" prior to make sure the RG505 was connected and it was detected successfully. EDIT: I ran adb reboot-bootloader and it seems to be moving me forward, I will be updating this comment. Edit 2: I managed to reinstall, but what happens is that I that when I boot, I see a small google setup screen for like a second, and then the screen goes black, I guess I will have to leave it with the original OS.

Hello, i just followed all the instructions, but accidentally pressed the down button instead of the home button (6m:15s). The anbernic now on the developer tools indicates that the bootloader is unlocked, and going to ADB fast Boot, prompting "fastboot reboot fastboot" a window pops up and the message "waiting for any device" appears. Additionally on the fastbootloader screen, i tried to flash the firmware but the equipment was not detected. On the Fastbootloader file i had to reboot the system, as i could do much more. Now my anbernic still works but loads up a message prior to the Anbernic Logo shows up on the top left side of the screen "fastboot mode INFO: LOCK FLAG IS: Unlock!!!. and a couple of seconds later the Anbernic starts normally. But now i no longer follow the instructions and press the HOME Button instead of the down...and also cannot entar Fastboot mode to flash the firmware. Can someone help? I know it can be a little complicated, but any help would be much appreciated. And also...can i run the FlashPartitions.bat with the RG505 on? i am asking because i cannot enter, the Fastbootloader (6m:55s) Thank you all. ;)

Here is your like and sub, thanks for this

You are backkkkkk

The Gamma OS 1.3.3 download from Google Drive is not available anymore due to high demand 😞

Thank you so much... Gamma OS is so much better!!!

Not doable on a linux system?

I did all the right procedure but it returns to the anbernic operation system, what am I doing wrong?

Hi! There is any improvement on PS2, GameCube, 3DS or Wii performance? That is the only reason I think this change is really needed for me.

Great guide but had the wifi issue once gamma was on the device. Apparently its common in newer units. So now I need to run the unbricker then reinstall which apparently fixes it...those there doesn't seem to be much in the way of guides for that.

Awesome! :) - I hope GammaOS' latency is lower than the usual amount in Android.

This is helpful. Thanks

I am kinda hesitant about making this change after all the time I spent working on dajinsho and retroarch. I feel i am going to loose it all. Do you recommend it?

Hey dude, how did you screen capture your rg505??? I do want to connect mine to the TV... If it means soldering in a mini hdmi I will... Just please let us know!!!!

Runs games better than my gaming laptop

Can you please do a Video on GarlicOS on the RG405M?

In the gammaOS readme "Quick setting tiles have been added for performance modes" I have no idea where this is and you can't change modes with L1 R1 R3

thank you so much !

ROB, thanks for the frimware, is there any more information that you can share i really appreciate you time an efort ...... thanks again

I have a 256GB SD card for this. What do I need to format the card before I install this? Also do I install it to my sd card or the internal drive for device? Sorry if I missed it in the tutorial

I completed this. Every boot says flag:unlocked! Boot message. It boots fine tho I'm just wondering, should I lock it back or is there no need to or does it need to stay unlocked?

I need help! I can't find my games on my Anbernic RG505. I click on a game to start it and I get the message 'It seems the game was not found'. What do I need to do?

Do you have to go through this process every time there is a new version of GammaOS? I just received my 505 and contemplating on installing GammOS.

Good guide, easy to follow. Until I got to the part where it didn't boot after flashing and bricked my RG505. So apparently if the boot file is configured differently, it just wouldn't work, oops. Trying the unbrick tool now from the github guide, on my 3rd hour of downloading the "10 minute" process to unbrick. Wouldn't have change OS if I'd knew there was a risk of bricking it.

Can someone help me. I'm on the Unisoc page and it says no compatible devices found and my rg405 is stuck in fast boot mode. I'm screwed.

Got mines today and did this...i will be testing all performances myself thank you i use your guide took me around 1hr to get it all done (slow laptop) but i dont know if its just me i prefer the os before is there anyway you can switch between the 2 ?

Just installed on to my RG405V using the same guide, tks man. Btw, there is a way to turn off the screen blocking?

thanks safely landed on 1.5.1

Where do I put my bios files for gb,gba,gbc and ps1

Hello, thanks for the elaborate instructions. I managed to install GammaOS to my RG505. One question, since the install, i get the error message (INFO : lock flag is : unlock etc) on the start screen every time i power on the anbernic. Is this normal or did i screw something up slightly?

Adb and fastboot are different now? I dont see any exe to download, just the full folder and the installer bat is doing how knows what...

I made every step. After flashing gamma os, anbernic 505 just constantly restarts with the message lock verify

So I cannot download ADB and fast booting from the website you mentioned. It did download the first thing you said to, but I can’t even find the second one with exe at the end, or even another link to be able to download. Please help???

The "Allow USB debugging" window is not showing up. Am I doing something wrong?

are the BIOS files preloaded in the gamma OS or do I need to add the bios files for each system?

when i get to the unisoc tool and hit connect it can not find any devices

Can someone explain what to press when trying to confirm entering fastboot mode? Pressing the volume buttons just causes "user cancelled", tried pressing all the other buttons too? Pressing back button didn't do anything for me. Anyone else? Thanks

I wonder if this works on a tablet with T618. Any chance you could ask the dev? 😅

I'm curious what happens if it gets messed up? Is there a way to revert and redo the steps?

It's all good until you get to the rg505 part what is that do you have it mirrored to your desktop or something. You didn't explain that part.. I wish you could do this without a desktop

I bought my anbernic 505 last week. just one question. Whats the difference if you install the gamma os? if you install the gamma os firmware they have pre install games?

After trying to flash the flashpartions.bat. it just stuck on "fastboot flash vbmeta_a flash/vbmeta_custom.img" and there are no other scripts that is appearing on the command prompt.. is it normal? Though I'm still waiting if it progress

I loaded Gamma OS. Everything seems ok except I cannot load PS2 or Gamecube games. Anything that needs a bios is also giving me trouble. Where am I supposed to put the bios files for this?

when its says it will take up to 5 mins , for you some time passes and it is showing 0. For me, it loads immediately after "it will take up to 5 mins" and it says 1. After that stock os is loading if I press power.

Hello guys i have problem 6:15 in this Moment i have press any button (i know iam a idiot) and the prozess stuck in this Moment. I can do nothing the Screen ist frozen. I Need Held please 😢

Thank you for making this video, i have the rg505 i like it got it about 2 months ago. the gammaos is 1.5v my question is after flashing system and reloading with gamma will the ps2 an wii emulators still be on

I have no ideia What I did wrong, but it started with stock firmware, doing it again now, coming back back with results soon...

Thank you! Any tips on how to add more emulators to this? And which ones? Maybe some preferred settings as well? Thanks' again.

thank you

Thanks for the tutorial, Retro Tech Dad! Do you know if there's a risk of screwing something up with the Anbernic RG505 while doing this and making a mistake? Can it be restored to the state it was when it shipped?

What if you don't have a Windows PC that only has a Linux base (Chromebook & Steam Deck)?

My screen doesn't want to turn on anymore. Only a letter G appears when I connect it to the charger... How to solve this problem?

Does the gamma OS have a native keymapper as well?

i have gammaOS and still everything is laggy in god of war on the PSP with 2x...why??

i need some help on that webpage where u hit connect mine says device disconnected and when i click connect it doesnt do anything so im not sure what to do now some help would be appreciated thanks

@retrodad seriously thinking of switching to gammaOS. Does it have emulation for Neo geo in built. Do I have to add this after install?

How do you get to the menu with the performance mode and remapping screen? Thanks for the help!

It works on any T618, (like powkiddy x28 a have...) or just for Ambernic?

Hello, thank you for the video! Great Guide! While trying to unlock the bootloader i got a massege on screen saying: INFO: LOCK FLAG IS : UNLOCK!!! and now im stuck there. Any solutions you might reccomend?

Is there an easier way to do this, like an SD card install from the console itself? I do not trust downloading this much stuff to my computer.

I bought an used RG505 and the gamma os is already installed but I don’t know which version it is, how do I know this? I want to update, I searched everywhere and couldn’t find where I can see the gamma os version.

Does someone know how to get the fastboot mode unfrozen. I don’t know how long bootloader is supposed to take

quick question if i put in new micro sd card ( formatted in exfat i assume ) will it create the required folders. Not sure how this will work

I rebooted the device before deleting everything. Is it going to be ok?

Hi, I just bought my 505 and trying to install GammaOS. But when I do 'adb reboot bootloder' the device is just restarting. Is there a way to understand if this device already have an unlocked bootloader?

I keep getting stuck at the unison page so it never works for me says no device found

I bought an RG 405V and I installed the gamma os, and it was successful but the thing is cannot find the games ,can you please help me

hey i dont get this prompt on my rg505 even though developer's option is turned on

If I update to Gamma OS, will my data from rg405v stock be deleted? Like bios, emulators and roms?

Will this mess up my emulators or delete them? Should I take out sd card before doing this?

Any person with 1.3.3 , which mali driver have it? . Playstore open gl view caps, vulkan view caps or aether sx2 , says driver version

Gud day Sir need some help, when i connect the anbernic to pc there is no sd card inserted? thanks for help Sir...

Hey, are you noticing some blur into Nintendo emulation? Snes and gba have some blur into plataform games like mario... How to fix it?

oh god, i followed this and made a mistake with the fastboot mode.

did i do something wrong,i get to the fastbootd screen and i cant install the os

Is there's a way to go back on it's original OS on my rg505? I'm getting a lot of error on it when im playing it when i upgrade my SD card to 256gb. My RetroArch was not acting as it meant to be.😢😢😢

Can I do this from a Mac? I'm getting frustrated

He everyone, i followed every step and already have gammaos on my rg505, but i cant find the key mapping configuration, the buttons are just getting crazy Any help?🙏🏻

A video with latest stock firmware vs latest gamma OS with gamecube/ps2/psp for see really , the fps difference.

How do I get to play GameCube games on my 505 I just got it 2 days ago and wanted to download smash bros but I’m not able To play it.. any help would be appreciated 😅

installed gamma os on my rg 405v everything is running well but It wont connect to my wifi

Hi friend! Thanks for tha tutorial! Unfortunately, mine RG505 goes back to the stock OS when i tried to install gamma OS. I even tried the unbricck method on the gamma os page, but didn't get any sucess with that. Could you help me?

Am I gonna be able to use the buttons on the ambernic rg505 to play cod mobile, or is this not worth my time ?