Action Half-Life (abbreviated AHL) is a mod for the award-winning first-person shooter computer game Half-Life. It strives to simulate action movies, especially those directed by John Woo.
Led by Dwayne 'Oddjob' Douglass, Action Half-Life went through several beta versions before being released as version 1.0. It originally had several lead programmers involved, but Stuart 'Payback' Crouch coded the last few betas leading to v1.0 (which was meant to be the final one).