Mantis-12

Mantis-12 Is the space shuttle that takes you inbetween missions as well as planets, its classified as a military shuttle and according to most material it is a little bit bigger than a van'''. '''

Apperances
The shuttle first appears on the first mission,Onslaught, the shuttle being the map itself although this is the onlytime it is ever this big, so we can reasonably assume that this was only for gameplay on this one mission.

Here, the ship appears to be more of a cargo ship with boxes, a cargo bay fits in the middle, and a passenger area up front although there appears to be holograms acting as screens for information, but there is no pilot seat. This area is the emergency forward jupseats.

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The next apperance is in the following mission, vaccine. Here in the intro we get a better outer veiw of the ship, which appears to be totally different. The wings and two rear engines are missing as well as the entire design of the shuttle being different, most notably the nose of the ship. Later in the mission, apparently the same ship picks you up but it looks more like it's original apperance, having two rear engines, wings, and a most egg like shape but keeps the same size of the ship in the introcutscene.