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.
Q4Run is more than a mod, It's skills.
I didn't play this, buth i am a DeFRaG player (q3 tricking/running mod) and this is perfect for improve your gameplay, specially on CTF.
You become faster. With that you become invisible, and with that you become unstopable. This is one of not-many mods who require true skills.
10/10, nothing more to say