Quartus II Subscription Edition v12.1 includes MegaCore IP Library
Select a previous version of Quartus II:
You may be exposed to a vulnerability issue if you have installed or plan to install Quartus prime/Quartus II software from v11.0 to v18.0 to a location with space(s) in the path. See this KDB solution for more details.
Download large, standalone installation files to manually install complete software and device support. Note: If you download and install only the Quartus® II software, subsequently you must also download and install the device support . You do not have to install all the device support files. You can install only the device support files that you need.
Quartus II Subscription Edition
Quartus II Subscription Edition Install relevant device files
If you do not have Internet access or if you require a DVD, you can download and use the DVD ISO file to create your own installation DVD for installing Altera's software and device support. You must first install the Altera Complete Design Suite (ACDS) software (Windows or Linux version) before you install the ACDS Devices software. You must install both the ACDS software (Windows or Linux version) and the ACDS Devices software.
Disk space: A full installation of the Altera Complete Design Suite v12.1 requires approximately 10 GB of available disk space on the drive or partition where you are installing the software, and approximately 30 MB of available space on the drive that contains your TEMP directory (Windows only).
View the following documentation for Quartus II software and device support details: