Excalibur is a resource management strategy video game for Atari 8-bit computers published in 1983.

Like Crawford's earlier Eastern Front (1941), Excalibur was released through the Atari Program Exchange.

The players can invade kingdoms, set tithes for their vassals, send plagues and pestilences (with the help of Merlin) and manage the loyalty of their own Round Table by rewarding their knights or, if they grow too disloyal, by banishing them.

[5] The Addison-Wesley Book of Atari Software 1984 gave Excalibur an overall A rating and stated that "those who persevere will find an ample reward in the game's incredible depth".

The book predicted, however, that it was "destined to become a cult game ... appeal[ing] mainly to the seasoned wargamer or fantasy role-player" because of the slow pace and difficulty.