Gambling Hall is a package of PC gambling games for entertainment purposes. Video Poker, Video Blackjack (21), Slots, Roll The Bones (craps), Hi-Lo. Video Poker is a jacks or better video poker game. Video Blackjack is a blackjack game, also known as 21, you against the dealer. Slots is a slot machine game. Roll The Bones is a version of craps, modified for PC play. Hi-Lo is a card game, guess if the next card is higher or lower.