First released by Milton Bradley in 1956, Rack-O is a classic set-collection and sequencing game where players aim to arrange numbered cards in ascending order within a rack.

Each player receives a plastic rack and a hand of cards dealt one at a time into the slots, locking them into their initial positions. During the game, players draw from the deck or discard pile and replace cards in their rack to create a perfect ascending sequence from slot 1 to 10.

A player shouts “Rack-O!” upon completing a valid sequence, earning points. The game continues over multiple rounds until a player reaches a target score.

Games like Sequence and Skyjo share a thematic or mechanical kinship. Sequence also involves ordered card placement, but through a blend of strategy and chance tied to a shared board, while Skyjo emphasizes number optimization and careful card management for scoring efficiency.