All ships contain some kind of hostile threat. You'll never know for sure what you'll be up against, but as you go through the campaign, you might collect some helpful knowledge about what's around the corner.
Every campaign will contain four different threats. The threats get more challenging as you progress through the missions. Although all threat types are individually distinct, they all share certain characteristics that you can exploit.
Every threat has a set of characteristics that can give you hints about how it might behave. These could include one or more of the following:
The more you encounter a threat, the more you'll learn about it. Without this information, you won't know how to kill them.
All enemy types have distinct behaviours. Some will fire weapons and coordinate, others can teleport, some come pouring out of portals - and some can regenerate and come back to life. As you become more familiar with the game, you'll be able to better predict and deal with these characteristics.
Some enemies can drag a Deadnaut a short distance. This can have dramatic effects because a dragged Deadnaut can't move or attack. It also means that even weak enemies can have a devastating impact on combat.
There are several ways you can deal with dragging:
When a Deadnaut is being dragged, a chain symbol will appear on their icon in the main viewscreen. Here, you can see a Deadnaut about to be dragged out of the room.