Direct ascent interceptors such as exo-atmospheric ABM missiles, ballistic missiles with modified guidance logic, space boosters carrying nuclear payloads, and homing vehicles such as the miniature vehicle system undergoing development by the United States.

CENTERFORSECURITYPOLICY: Straw in the solar wind

For example, instead of the lunar rendezvous method that NASA chose for the Apollo program, the player can opt for Earth-orbit rendezvous or even direct-ascent where a single giant spacecraft lifts off from Earth and lands on the Moon.

FORBES: The Return of "Buzz Aldrin's Race into Space" Game