Base Ganymede is a vanilla compatible megawad for Doom created by Adam Woodmansey (Khorus). It was released three times at different stages of its development. Base Ganymede E1, containing the first episode was released on 15 November, 2009. Base Ganymede: Episode 2, contained just the second episode and was released on 18 November, 2010. The second episode was named as a runner-up at the 17th Annual Cacowards.
Finally, on 20 January, 2012, Base Ganymede: Complete was released, containing the previous two episodes in addition to a third. Reviews of all three releases were positive, and the finished megawad received one of the 19th Annual Cacowards.