do I need two copies of Raft to co-op play with my family?

[dosuser]

I want to co-op play with my family, is it possible to run two Raft clients on same wifi network with single steam account.

[Anonymous Helper]

Every player needs their own copy of the game and their own Steam accounts. Raft only supports Online Multiplayer thru Steam. One player hosts a game, other people (must be Steam Friends) join.

Steam Summer Sale is due in about months time and you'll probably can get Raft 30% off during that time saving you 6 $/€ per copy.

https://isthereanydeal.com/game/raft/history/