From download to your first executed script, including attach, the editor and the console. No emulator and no Android device required.
Grab the current build from the download page. It is a single executable of about 21 MB, so it lands quickly. Double-click it from your downloads folder. There is no installer, no setup wizard and no key to enter.
Tip: move the file to a permanent folder before first launch so future updates can replace it in place.
Start the Roblox client and join the experience you want to work in. Delta attaches to a running process, so the game needs to be open before you press Attach.
Tip: wait until you are fully loaded into the game, not the loading screen.
Press Attach in the top bar. Delta lists every open Roblox process by name. Choose the one you want and wait for the status indicator to turn green. That means execution is available.
Tip: with several Roblox windows open, the process picker is how you choose which one receives the script.
Open the Scripts tab and pick something from the hub, or press New and paste code into the editor. You can also open any .lua or .txt file from disk. Everything appears in a tab you can edit.
Tip: the hub loads code into the editor before running, so you always see what you are about to execute.
Press Execute. The console panel prints output, warnings and errors in real time. If a script fails, the trace points at the line that stopped it, and you can fix it in the editor and run again without reattaching.
Tip: use the console clear shortcut between test runs to keep the output readable.
Keep a folder for the scripts you reuse. Delta remembers recent paths, so opening one is a single click next session.
Open a second Roblox window when you want to try something without interrupting your main session. Delta attaches to each separately.
When Roblox ships a new client, close and reopen Delta so it can load the matching attach layer before you connect.
Make sure Roblox is fully loaded into an experience before pressing Attach. If you launched the game after Delta, press Refresh in the process list.
Open the console and check for an error trace. Most failures are a missing service name or a script written for a different game. The line number in the trace points at the cause.
Close Delta completely, reopen it and let the launcher fetch the current build. The attach layer ships separately from the script hub, so this is usually a small download.
Use the process identifier shown next to each entry to pick the right instance. Delta keeps each connection separate, so switching does not affect running scripts.
The download page has the current release, requirements and release notes.