MONSTER HUNTER: WORLD
98 Achievements
2,000
300-500h
Hunters United Forever
Complete 100 quests via multiplayer.
15
7.74%
How to unlock the Hunters United Forever achievement in MONSTER HUNTER: WORLD - Definitive Guide
Special Arena missions are by far the fastest way (select 'optional' for these when you search) but they won't count towards the 50 arena quests... That's done in the Gathering Hub.
If you change your mission preference to 'optional' or 'investigation' then also manage to capture the monster...
You'll be working towards a few achievements like...
Complete 100 quests via multiplayer.
Complete 50 optional OR investigation quests.
Complete 10 SOS flares.
Capture 50 monsters.
Hunt 100/500 large monsters.
To capture you need to use a shock/pitfall trap when a monster is low on health and then do a couple of tranq bombs. You can craft more traps and tranq bombs mid game if you bring the required materials along.
Note* you will probably fail the mission a couple of times, kinda depends on the difficulty and the players hunter experience/skill. 3 faints and the whole team is out!
You will also likely join some sessions and your team will kill/capture a monster before you even get there...
Happy hunting :)
For this achievement, it doesn't matter if you host or join someone else's quest. If joining, try to join within the first ten minutes of the quest or you won't get rewards, though it will count for the achievement.
I would suggest sending out an SOS flare for any quest you're on even if you prefer to play solo, as the extra players can help if you prefer ranged weapons, it will chip away at this, and it will cut down on the grinding later if you manage to get all the co-op quests done during the story if you prefer to play alone. Be sure to always send your Guild card out when someone joins you! It's the nice thing to do, and they may reciprocate to help you as well.