I got sick of playing multiplayer maps where you get a message every 150 kills or so, and you never know exactly where you're at, so I designed this kill counter. I usually set it up with gold; you get 1 gold per kill, so, at any given time, you can glance up at your resources and see exactly how many kills you need to get the next bonus or whatever. However, there are many other potential applications for this 3-trigger system, and this fully playable template covers several of them.
Special thanks to DiGiT, creator of Age Of Kings Trigger Studio, and iKraz, who helped me figure out how to fix the major problem with my kill counter.