Arcade Classic No. 4 - Defender & Joust is a two-game compilation for the Game Boy. It contains two classic Williams games: Defender and Joust. The games have altered graphics but the gameplay is largely faithful to the originals. The games does not support the Link Cable, but does allow two players to play competitively by taking turns using the same Game Boy. When played on a Super Game Boy the games have borders designed to look like the original arcade cabinets.