Game code tech debt has some of the juiciest, hackiest tech debt out there. LoL is no exception there, some crazy gremlins that they've talked about publicly.<p>Invisible minions/NPCs isn't unique to LoL either, that's a tried and true hack / tech debt thing. To the point where I question if it's even debt anymore. See e.g. WoW and invisible bunnies (<a href="https://kotaku.com/the-invisible-bunnies-that-power-world-of-warcraft-1791576630" rel="nofollow">https://kotaku.com/the-invisible-bunnies-that-power-world-of...</a>).<p>I like the 3 metrics of tech debt here.