When the player changes to another time period, entities in the previous time period stay "paused" and cannot be interacted with. When switching back to the previous time period, they will now resume from where they left off. There is currently a bug where they will drop items in a seperate time.

Tweaking collision to work with time travel. Originally it would only read the present time period. Now it takes the current time period into account.

Update: got it working with saves

I had to change a considerable amount compared to standard Quake to get this to work. Also, there are some bugs still like enemies not spotting me immediately. They can also cross time-periods which may or may not be useful as a mechanic.

There's a ton to iron out, but this is what I have so far for a Quake-derived game. Note that I'm using LibreQuake in place of the ID assets.

The biggest thing so far is being able to switch between three loaded BSPs at runtime as a time travel gimmick.

Black Mesa Skateboarding Team

"Here, let's try this."

me when i feel a spider on me at night