player.pl or something else to update a counter?
 

Each time a person dies is there a way to run commands on them? Like death_counter = death_counter + 1? Vice versa, if someone kills something that they get a kill_counter?

If you are talking about NPCs vs Players, then you could probably use this:

sub EVENT_SLAY - Triggered whenever an NPC kills someone.

And then just use quest globals to keep track of your scores.

For players killing NPCs, you can just use this:

sub EVENT_KILLED_MERIT - Triggered on NPC death when you are in the group credited with doing the most damage to said loottable NPC.

If you want to keep track of player vs player, I haven't tried it, but maybe you could use EVENT_ZONE and check the players current HPs when they zone to see if they are <= 0. If so, then you up the counter for them being killed, but I don't know how you would up a counter for killing another player.