Browser-Based Games With Marriage & Family (No Download Required)
True browser games with deep marriage and family systems are rare, but a few social worlds come close. Most require accounts; some lock features behind subscriptions.
Social Worlds With Marriage Mechanics
Habbo: Marry other players, adopt virtual pets, decorate rooms in a pixel-art hotel.
IMVU: 3D avatar customization, marriage ceremonies, limited family mechanics.
Second Life: Deep customization, player-created marriages, families, and homes. Steep learning curve.