I doubt you'd be able to coordinate with completely random people but if it's like a group you made then it would probably be fine. I mean not everyone in game has to have an account on this website so I don't see why you'd be restricted.
Hello, new moderator here, but with speedrunning knowledge!. I updated the rules, I hope it's not too confusion, here I will copy paste them ; I've inspired from 2 other games where you can run with Randoms : Phasmophobia and Warface ; I've tested playing with random people and I think this is fair, if something, reply with a smart proposition... Actually in Warface, you are almost obligated to run with Randoms
"Rules about multiplayer runs with random people : You can play and submit your runs with people you don't know from the lobbies. Although here are the 3 rules to respect on how to count how many people you have with you : 1. - Obviously if all the players participate into the game, count them all. 2. - If someone has been participating into building towers, but didn't move, AFK, Disconnected, Quit or simply hasn't placed any offensive Towers in the first 2 minutes (approx.) of the match, you don't count them in. Example : If you see a player having & upgrading 5 Cats for the first 2 minutes (in a 9minute long match as a Party of 3) and not using any other tower and even stopping playing on the 3rd minute, you don't count them in and you'd end up submitting in the 2-player category. 3. - If a player is AFK and someone has upgraded his Towers, no matter how much they have been active, you have to count them in. Example 2 : If a player has placed 5 Magicians lvl1 and quit in the first 2 or 3 minutes (in a 9minute long match as a Party of 3), you would like to upgrade their Towers, you would end up count them and submitting in a 3-Player category. For any undetermined Player# category, please submit in the category with as many players as it shows after the first 2 minutes pass by."
The new update to the leaderboard has happened. This leaderboard adds New Versions to the leaderboard. This is because the new update recently has made it almost impossible to reach old times. Have fun getting new world records!