Hidden mission in GTA 5: How to unlock the alien mission

With the Gunrunning update, Rockstar Games GTA 5 has added a hidden alien mission. Find out how to unlock this mission here.

GTA 5: Unlock Alien Mission

• The prerequisite is that you have already carried out at least 600 gun running deliveries in GTA 5.
• To unlock the alien mission, start a supply mission between 9 p.m. and 11 p.m.
• This mission is about stealing the eggs of the aliens, which are near the crashed UFO, and taking them to a bunker nearby.
• However, please note that the alien mission can only be unlocked and played once.

You can find many more practical tips about GTA 5 here.