The Tragical History of King Richard Iii, Alter'd From Shakespeare (1699) is a history play written by Colley Cibber. It is based on William Shakespeare's Richard III, but reworked for Williamite audiences.
Cibber, a prominent theatre manager, first attempted to stage his version in 1699, but the performance was a disaster. The Master of the Revels censored the entire first act and the production was a popular and commercial failure. Cibber published the script in 1700, including the problematic act, with a short note on its suppression. Ensuing performances from 1704 eventually risked the entire play in Cibber's new form. The play became a success with leading actors such as David Garrick playing Richard III.