|Appears in (anime)|
|Appears in (manga)|
Alcatraz is a small island used by KaibaCorp. It was originally used as a military base, and later became host to a massive Duel Tower used for the Battle City Finals. After the end of Battle City, Kaiba blew up the island.
The location is named after the real-world island, Alcatraz, which was formerly used for military activity and later a maximum security prison, which has since been closed.
After Seto Kaiba came into power, he tore down the military base and constructed the Duel Tower on its ruins to emphasize the company's shift from military to gaming.
The inside of the Duel Tower was used to stage a Battle Royal to determine the match-ups for the semi-finals. Each finalist stood in an elevator-like platform in a corner of the room. As their Life Points lowered, they were lifted higher up. The first two to the top would face each other in the first semi-final round and the remaining two would face each other in the second.
Kaiba was determined to face Yugi Muto, while Joey Wheeler was determined to face Marik Ishtar (with Yugi supporting Joey's choice). Marik and Joey's Life Points hit 0 first, pairing them up for the first semi-final and leaving Yugi and Kaiba for the second.
The semi-finals and finals each took place on top of the tower.
Kaiba faced Joey in a third place playoff, just outside the tower.