Contrary to popular belief, you don't have to kill a single foe in World of Warcraft to hit level 85.
Fighting enemies is a big part of World of Warcraft. It even has "war" right there in the name, so you'd think whipping out a sword or spell from time to time to roast an evil turtle would be a requirement. Alas, it isn't, as a player recently hit the current level max of 85 without killing a single virtual foe.
Night Elf Druid Everbloom of the Feathermoon server pulled the feat off by only engaging in gathering professions and exploring, which both offer experience points of their own. She, who may or may not actually be a he, took on mining, herbalism, and archaeology, in addition to traveling to every possible nook and cranny of the game's world. Everbloom wrote on the Blizzard forums that she's been playing World of Warcraft since the day it was released back in 2004, and still discovered new landmarks in her quest.
Everbloom hit level 85 after dying just 25 times, though she absorbed 3,000,000 damage along the way too. She says she chose a Night Elf Druid for its healing abilities, rooting abilities (which can freeze enemies in place), and flight transformation.
If you're skeptical, a visit to Everbloom's profile clearly proves that she has no kills, and only completed 1 quest by accident when she opened a letter that came in the (virtual) mail. She plans to do it again, but without opening her mail this time.