|LEGO → System → Space → Mars Mission|
The MX-81 is one of the largest aircraft vehicles used by the Astronauts. Inside is a detailed lab which has an x-ray machine.In the lab you can also see two crystals which are used as "fuel" for the ship. Also included is an Alien vehicle and a small Astronaut mining vehicle. The drill on the mining vehicle rotates when the wheels are moved.You can land and reload it by releashing the platform on the back of the ship by pressing a button which is in front of the handle of the Hypersonic Operations Aircraft(HOA). Two patrol space crafts, a small one and one with more lasers, can be separated from the main vehicle. The HOA can also launch a missile and has a handle so one can play with it with ease. There is also a translusent orange capsule to store the captured Alien (Mars Mission) and a translusent yellowish green box with a "radioactive" sticker on it to store the energy crystals(you get a total of four in the set). Finally a small satellite can be detached
- The set resembles the set 6980 Galaxy Commander released in 1983 in the Classic Space theme.
- The HOA appeared in the online game, CrystAlien Conflict. It is the base in the astronaut special ops' levels.
- From the 2008 Mars Mission wave only set 7644 MX-81 Hypersonic Operations Aircraft and set 7647 MX-41 Switch Fighter have the translusent orange capsule to store captured Aliens or energy crystals.
- The Alien Commander (Mars Mission) is only included in sets 7644 MX-81 Hypersonic Operations Aircraft, 7645 MT-61 Crystal Reaper, 7646 ETX Alien Infiltrator and 7649 MT-201 Ultra-Drill Walker
- In Space Adventures - Mars Alien Attack, it is revealed that one cockpit has controls for the lasers, while the other has control for steering
|Space sets released in 2008|
|5616 Mini Robot | 5617 Alien Jet | 5619 Crystal Hawk | 7644 MX-81 Hypersonic Operations Aircraft | 7645 MT-61 Crystal Reaper | 7646 ETX Alien Infiltrator | 7647 MX-41 Switch Fighter | 7648 MT-21 Mobile Mining Unit | 7649 MT-201 Ultra-Drill Walker | P7231c Mars Mission Fountain Pen | P7222c QLever Mars Mission Rollerball Pen|
|[ full list ]|