Maybe ending 3 is the goblins you've killed along the way!
Now? Now you sit down and think over your actions very thoroughly. That goblin was a sentient creature YOU killed. Probably had a name, a family, a home, dreams... I can't even look you in the eye anymore. The loving, carefree Dorkfishie I once knew is gone, replaced with a cold blooded killing machine...
In all seriousness if you achieved Ending 1 and 2 then you've beaten the game, Ending 3 is a wild goose chase I may add to the game later.