Download

Get Index IV.

For Windows 10 and 11 (64-bit). You need the Roblox desktop client and a Discord account.

Download for Windows

Version · Download only from this site or our Discord.

Then set it up.

Get a license key

Choose a plan on the pricing page. Your key looks like IDX-XXXX-XXXX-XXXX.

Download Index IV

Use the button above, from this site or our Discord only, and extract it to a normal folder.

Open Roblox

Start Roblox and join Anime Battle Arena. Index IV works with the Roblox desktop client.

Sign in with Discord

Start Index IV. Your browser opens to Discord, then returns to the app. Allow the firewall prompt if you see one.

Redeem your key

Paste the key on the activation screen. Your license is now tied to your account and works on two PCs.

Pick a character

Open Roblox, open a character in Index IV, switch it on, and press its key in game.