ArmA 3 has more than 10,000 players worldwide and although a MilSim game, it does have more competitive or even arcade-ish modes like King of the Hill. If possible, it would be great if events were supported.

Some events that come in mind now are:
- Kills
- Deaths
- Revives (other user revived someone or they get revived)
- Vehicle destruction (similar to kills but for vehicles), enemy or friendly
- Tasks created/assigned/canceled/failed/completed.