1) Game 2) Like euchre and bridge 3) Like piano duets 4) Quadrumanous 
• (a.) Having four hands; quadrumanous. • (a.) Requiring four `hands` or players; as, a fourhanded game at cards.
Four'hand`ed adjective 1. Having four hands; quadrumanous. Goldsmith. 2. Requiring four 'hands' or players; as, a fourhanded game at cards. 
[adj] - (of card games) involving or requiring four players
adjective (of card games) involving or requiring four players