Board Game Arena

In a 3p cooperative game, we eachh got 12 tentacles before the PI, but on the final game results tab it declared the game a "Tie." Other cooperative games say that the players won.

https://boardgamearena.com/1/cosmoctopu ... =675188318

Probably because the "other cooperative games" to which you're comparing this are marked as purely cooperative in the BGA database, whereas this game is often played competitively. BGA's system doesn't take the mode into account, just the flag in the game's database.