File: Nidhogg.2.v23.11.2017.zip ... -

Ensure your DirectX is up to date. This game requires at least DirectX 11.

The November 2017 update included several stability fixes over the initial August launch: Support for 1v1 duels. File: Nidhogg.2.v23.11.2017.zip ...

You likely need the Visual C++ Redistributable Packages . Download and install the latest x86 and x64 versions from the official Microsoft website. Ensure your DirectX is up to date