If your game doesn’t support windowed mode directly through its in-game settings, you can use Steam’s launch options to force it into windowed mode. For games not built on the Source or Goldsrc ...
Note: This guide is intended for advanced Steam users familiar with command-line parameters. New users should be cautious about changing unfamiliar settings. Not all Steam games support launch options ...
Local co-op options can be a bit harder to find since the feature is not typically prioritized on platforms like Steam, but they also exist and there are some great titles out there. Co-op games ...