Long-time hunters of Plants vs. Zombies Garden Warfare 2 achievements know that there is a snag, if players intend to complete every achievement in the free Trials of Gnomus update. Several achievements rely on certain events appearing in the game's Mystery Portal, and for whatever reason a couple of those events very rarely end up in the game's internal Mystery Portal calendar. The rarest of all Plants vs. Zombies: Garden Warfare 2 achievements are those related to the Boss Hunt event. That event has finally re-appeared in the Mystery Portal, starting today and running until November 11th.If you're wondering how to get into the Mystery Portal and defeat this particular Boss Hunt – which is the Spooky Squash – you should follow the instructions in our community's Plants vs. Zombies: Garden Warfare 2 walkthrough , which describes how to get each of the three related achievements in detail:Even the community's Boss Hunt guide warns you that this is a tough feat to pull off, especially with random co-op partners. The suggestion is to set up a Plants vs. Zombies: Garden Warfare 2 session here on TA. If you're looking for a group to play Xbox games with , and especially if you are looking to hunt down specific multiplayer achievements with like-minded community members, the gaming session calendar is the place to head. The community have already set up a whopping 56 sessions in the coming week to try and get these super-rare achievements, and you can always create a new one if they fill up or if the times are not suitable.The Boss Hunt event, and therefore the three Boss Battle achievements, are only going to be available until November 11th — and we have no idea if or when the event will reappear. Be sure to check out our Plants vs. Zombies: Garden Warfare 2 guide if you are just getting started in the game.