Forced Party

Forced party is a mechanic discouraging solo gameplay.

Typically this type of party is required for instanced dungeons/areas/quests, forcing player to create a group/party with in-game tools.
In effect the game presents challenges that are:
1.Not solved by one player, requiring support classes.
e.g. players revived/healed by others.
2.Requiring multiple damage sources and dedicated tanking characters.
3.Presenting high-level threats/traps which have to be found by chance or high-risk.
4.Large advantages to have a party to get bonuses or rewards(multiplying exp/loot vs solo gameplay).
5.Solved by Inter-class skills which work better in combination.

Typically such forced parties disband once the objective is met and players don't form any long-term bonds or friendships.