Dying Light
68 Achievements
1,490
58-73h
Harran Athletics
Take part in 10 coop competitions
25
7.27%
How to unlock the Harran Athletics achievement in Dying Light - Definitive Guide
Gt: J ROLL 1998
First, you need (ideally) two people. Once you get to a spot where you need to load to leave/ enter like the elevator at The Tower or the Underground Parking Lot, you can continue to enter/ exit and then create a waypoint nearby - this should create a competition prompt that you then accept and your partner accepts. For this achievement you only need to take part, not win, but one of you does need to complete the challenge for it to count.
The reason for entering/ exiting is that it seems these show up at random on a timer, even when the challenges are set to frequent. By reloading the area you are resetting the timer and it will try to apply a challenge to the first thing you do, in this case a race.
Co-op competitions are random events that appear as you're playing cooperatively with at least one other person. You can increase the frequency by which they appear by pausing the game and going to Options > Online > and then adjust the frequency of dynamic competitions to Frequent.
If you're playing with someone random online, this may take a while and be a bit of a struggle depending on how good and competitive they are. The fastest way to get this achievement with a boosting partner is to have the person going for wins either pick up one piece of loot for the loot challenge or run to one waypoint for the racing challenge, and then just let time run out for each challenge to get a quick and easy win. Repeat nine more times to unlock this achievement.
See Lucky 7 for more details.