VIPER

Download Viper

Download the official Viper Public Baseline 1.0 client for Windows. Extract the ZIP into a new folder, then run Viper.exe.

Download Viper Client 1.0

SHA-256
ab5470db817524814a0b7d5423eac26e7a0287f31b0df3d1f3aaf511cbf32923
519,264,099 bytes

Windows may warn that the publisher is not yet recognised. Only use the download from viperonline.net and compare the SHA-256 above if you want to verify it.