Talk:Turret/@comment-24152133-20150114121608/@comment-24241876-20150125024448

Keeping in mind, this may be all speculation, but from my experience:

I would wager that the tower would prioritize targets based on their degree of drawing aggro. (Ex. Have they damaged an enemy champion recently?)

If all of them are simply just sitting in front of the tower, with the same level of turret aggro, I would assume that it would attack the closest enemy champion.

However, there are other things to factor, aside from what affects their proximity to the tower, such as champion hitboxes, which determine whether or not something is "closer" to the tower.

For Example:

So, let's use mid red side outer turret for example. Let's say Blue team has a Teemo on Top Lane, a Sion on Jungle, and a Yasuo on Mid Lane. The three of them successfully performed a tower dive Yasuo's lane opponent. However, Yasuo is killed by the turret shots because he was predominately drawing the turret aggro. Sion and Teemo are still within the turret range, however.

Now, let's say that there are no blue minions nearby. The tower would then target the closest enemy champion, either Sion or Teemo, in this case. Each champion has a respective hitbox, that would show the size of the chamion in-game, as well as how simple or difficult it would be to target them or hit them with skillshots.

Let's say the center of these hitboxes are the same distance away from the tower. Basic attack range is calculated from edge-to-edge, so because of Sion's hitbox being much larger than Teemo's, we can assume that Sion (the champion with the larger hitbox) will be the one to draw turret aggro.

However, in another case, let's say that instead of the center of their hitboxes being equidistant from the tower, the edge of their hitboxes are equidistant. Such cases would be incredibly hard to produce, considering the slim chance that two champions' hitboxes are exactly equidistant from the tower. At that point, your guess is as good as mine. The best I could assume is that it would just be left up to random chance at that point, considering the near-impossibility of this event happening.