How do i make my game fullscreen?

Every time i cook a project (release, development) it is not fullscreen. How can i fix this?

Downside is that this only toggles fullscreen, so if it was fullscreen you would go to windowed mode.

After some research it appears that the fullscreen system is seriously broken. The seemingly correct way was to adjust your DefaultGameUserSettings.ini but that appears to do nothing at all now. The only successful way I have found is to put -fullscreen in the command line or set it in C++ in the game mode.

You can use the Fullscreen console command but it toggles fullscreen so you may end up setting someone who is fullscreen to windowed mode.

If its never been set, why would it already be fullscreen?

You would only need the fullscreen toggle on an initial load of the game, not every level.

If you were already playing fullscreen then did a level swap/etc it would retrigger begin play.