The exact silent switches the Thetis (HL2) installer accepts, plus a one-line command you can paste into a script, Intune Win32 app, or Configuration Manager package.
msiexec.exe /i Thetis-v2.10.3.13x64-HL2.msi /quiet /norestart
Run from the directory containing Thetis-v2.10.3.13x64-HL2.msi. Download the installer from the Direct link below first. Run an elevated terminal (Run as Administrator) for machine-scope installs.
| Architecture | Scope | Type | Silent switches | Source |
|---|---|---|---|---|
| x64 | machine | MSI WiX | Default for WiX (MSI) |
/S for NSIS, /quiet /norestart for MSI).Prefer the winget route? See the full Thetis (HL2) install page.