FortWayneMusic.com

col·lude /kəˈlud/
–verb (used without object), -lud·ed, -lud·ing.

1. to act together through a secret understanding, esp. with evil or harmful intent.
2. to conspire in a fraud.
   [Origin: 1515–25; (< MF) < L collūdere to play together, equiv. to col- col-1 + lūdere to play]

past tense = collusion.

Guilty as charged.

well. . .not really. collusion is the state of being colluded. . .but yeah, I get the point.

colluded would be the past tense.

Collude = misspelling of Quaalude