Roundup

A filler type old-style card game where you draw 1, play 1 to claim steer cards. Whoever has the most steer cards when the deck (45 cards) is depleted and all cards are played out (from 3 card hands) wins. You can claim a steer card directly by playing a Bar X card, or claim someone's steer card / Bar X stack by playing a Rustler, or claim someone's steer card / Bar X / Rustler stack by playing a Deputy.

The rules say it's best played with 2, 3, or 4 players, but 5 or 6 may play if desired.