Skip to content

Using OFP with Knossos.NET

Mike Nelson edited this page Oct 27, 2026 · 2 revisions

Using OFP with Knossos.NET

This page shows how to switch a mod in Knossos.NET from the stock FSO engine to the Open Freespace Project (OFP) engine. It takes two steps: download the OFP build, then tell your mod to use it.

1. Download the OFP build

  1. Open Knossos.NET.
  2. Click the Engine tab in the menu on the left.
  3. Click the Custom Builds tab in the menu along the top.
  4. Find the latest Open Freespace Project build and click Download.

When the download finishes, OFP is installed alongside your other engine builds. Installing it doesn't change any of your mods.

2. Switch your mod to OFP

  1. Click the Develop tab in the menu on the left.
  2. Select your mod.
  3. Open the Packages tab.
  4. In the package's dependencies, find FSO [ FSO ] and replace it with Open Freespace Project [ OFP ].
  5. Click Save Changes.

That's it. Your mod now runs on OFP, and QtFRED opened for the mod is OFP's QtFRED.

Good to know

  • Switching back: repeat step 2 and replace Open Freespace Project [ OFP ] with FSO [ FSO ].
  • Newer OFP builds: when a new OFP build comes out, download it from Custom Builds the same way.
  • Missions made with OFP features: a mission that uses an OFP-only feature needs OFP to play it. See OFP Features for what OFP adds.

Clone this wiki locally