Delta Game Emulator is currently the number one free app on the App Store, allowing you to emulate retro games on your iPhone with ease.
With Apple’s decision to allow game emulation on the App Store, Delta gives us a fantastic example of what gaming on iOS can look like, allowing you to play some of the best video games of all time on the best iPhones.
This guide will teach you everything you need to know about the Delta Game Emulator app, including how to add games, how to change the way it looks, how to take advantage of the best settings, and even how to add cheat codes to the games you loved as a child.
Here’s how to use Delta Game Emulator on iPhone to play retro games.
How to add games to Delta Game Emulator on iPhone
So you’ve just downloaded Delta Game Emulator from the App Store expecting to see some of your favorite Game Boy Advance games in the app, but you’re greeted with a blank page when opening for the first time. How do you add games to Delta and what kind of games can you add in the first place?
Let’s start by looking at compatibility. Delta currently supports a wide range of retro game consoles including:
- Nintendo Entertainment System
- Super Nintendo Entertainment System
- Nintendo 64
- Game Boy (Color)
- Game Boy Advance
- Nintendo DS
Delta’s developer has said that more systems will be coming to the app in the future, so if your childhood favorite isn’t listed above, don’t fret it could be coming soon.
Delta is pretty easy to use, but you’ll need ROM files to add the games you want to play to your iPhone. ROM files are available for a multitude of retro game titles, however, many of them remain protected by copyright law, and downloading them is technically illegal, even if you already own a physical copy of the game. Homebrew games, copyright/DMCA-free titles created by enthusiasts, can be downloaded from sites like Homebrew Hub.
For this tutorial, I’ve chosen to play the demo of a newly-released Game Boy Advance game called Goodboy Galaxy (Full Version available for $20). You can download it from the official website and it will be added to the iPhone’s Files app. Here’s how to add it to Delta.
- Open Delta
- Tap the + icon
- Find your game file in the Files app (in this instance Goodboy Galaxy Demo)
- Tap Open
You’ve now added a game to Delta Game Emulator and can start playing without any hassle. If you want to see some original artwork for your game in Delta’s library then you can also add artwork. Here’s how to do it:
- Long press on your game in Delta’s library
- Select Change Artwork
- Choose from the options provided (Games Database allows you to search for games)
- In the instance of Goodboy Galaxy, the .ZIP includes artwork so select Files and then the artwork. You’ll now have original artwork for the game in your library.
Delta will manage your games and separate them based on the console they are made for. This is fantastic as it allows you to have a range of games from different generations without everything being crammed into one library.
How to change controller skins in Delta Game Emulator on iPhone
Each console’s emulator has its own controller and while Delta’s default controller skins are pretty nice, it’s fun to experiment with other designs to tap into your nostalgic itch. You can find loads of fan-made controller skins online from sites like Skins4Delta. As a child, I had a purple Game Boy Advance, so I found a skin to bring me back to the good ol’ days. Here’s how to add it:
- Download a skin to the Files app
- Open Delta and tap the Settings icon (top right)
- Tap the console of your choice under Controller Skins
- Tap on the portrait or landscape skin (in this case I’ve downloaded landscape)
- Tap the + icon
- Select the .deltaskin, then Open
- Select the skin you just downloaded
Now your games will have the controller skin you’ve just downloaded framing the screen, it’s a really cool way to make Delta feel like your own consoles from back in the day.
Which controllers can I use with Delta Game Emulator for iPhone
While the touchscreen controls are fairly responsive, nothing quite beats playing a game with an actual controller. Luckily, Delta has thought of that and the app has controller support for some of the best games controllers for iPhone. Here’s the current list of compatible controllers that you can pair via Bluetooth or wired:
- Nintendo Switch Pro Controller
- Nintendo Switch Joy-Cons
- Nintendo Switch Online controllers (NES, SNES, N64)
- PS4 DUALSHOCK and PS5 DUALSENSE
- Xbox
- MFI game controllers
- Bluetooth and wired keyboards
How to use Save States in Delta Game Emulator on iPhone
The great thing about an emulator like Delta is that you can easily save your game at any point, making it great for pick-up and play sessions on your iPhone while out and about. Save states can be found in the menu while playing a game. Here’s how to use them:
- Tap the menu button while in a game
- Tap Save State
- Tap the + icon to add a save state
Delta uses an autosave feature but it’s always nice to be able to save at specific moments you want to. This is especially useful before a boss fight or if you’re trying to capture a shiny Pokémon in a Pokémon game and want to continuously reset the save until you find one.
Other handy settings in Delta Game Emulator on iPhone
Cheat codes
Do you remember as a child some of your friends owned GameSharks? They could use cheats in games like Pokémon to access rare species that you couldn’t find by playing the game normally. Well in Delta, you can use cheat codes directly from the app, and it’s so much fun to do so.
- Tap the menu button while in a game
- Tap Cheat Codes
- Tap +, then enter the code for the cheat code platform you want to use
It’s that simple, and allows you to quickly access fun elements of games you wouldn’t have been able to as a child.
Quality of life improvements
From within the in-game menu, you can also Fast Forward your game and Hold Buttons. The former is great for games like the original Pokémon games where your character moves slower than a snail and the latter helps with games like Mario Kart where you can automatically press the acceleration button without holding it down. These simple quality-of-life improvements make playing games, even with touch controls a breeze.
One more thing… Gaming on iPhone just evolved
Game emulators like Delta give a new lease of life to gaming applications on the App Store. As a huge retro gamer, I’ve been enjoying playing some of my favorite games on my iPhone 15 Pro Max. As an enthusiast, I would always recommend buying original hardware or an FPGA system like the Analogue Pocket to get the most from your old games but if your iPhone is the only device you own Delta sure makes for a great gaming experience.