%20 is encoded space if I remember right, so even then they were already incorrect

You can play a lot of PvE games without competition. Deep rock galactic, space engineers, Minecraft mods, left 4 dead, divinity original sin (or baldurs gate 3 these days).

I think there’s AoE and starcraft co-op these days.

You can also okay grand strategy games in a peace with players war with cpu only game.