Q4Run is a modification for Quake4. Primarily it's based on trickjumping and combining tricks. The first idea behind this mod was to implement timers which makes it possible to finish a specific "run" map in a certain time and then improve it afterwards. Every run will be documented in a demo named after name of player and map and time. If you want you can share those demos with other players so they can watch your skill or can help you to improve it. Comparing to others' times you can try to beat them or be proud of yourself because of better records.
The core of Q4Run - the timers. Without these entities it wouldn't make any sense to play this modification.
Posted by Bliccer on Dec 28th, 2008
Create a brush at the position where your start might be and convert it into a trigger_multiple. Place the target_timerstart somewhere in the room; not in the void. Link the trigger with the target and you should see a turquoise line (select the trigger first, then the target and press ctrl+k). If the player runs through the trigger the timer should start. If you want to create a checkpoint (yellow box) or a stop timer (red box) use the same method.
Just one more thing: If you want, you can make the start timer resettable (key: resettable; value: 1)
If the player runs through the trigger again after he has activated it, the clock restarts. But in my opinion a timer reset destroys the run.
For example: A lot of players like to grab the rocket launcher in the map, run back to the start, boost themselves through the timer again and save some seconds. That's normally not in the mind of the mapper. But you have to decide yourself if you want to use that function or not.