X-Morph: Defense
40 Achievements
22-26h
Steam
Can't touch this
Finish a mission without dying even once.
53.8%
How to unlock the Can't touch this achievement in X-Morph: Defense - Definitive Guide
If you wanted to knock this one out really quickly you could do a survival game and kill a few enemies and then let your core die. It seems this specifically means the ship you control.
A more focused approach in a mission would be to make sure you use cover and dodge. When you use the charge beam you get a small shield in front of you until you fire (holding down the trigger). If you're struggling with any boss missions (the first one for example) wait for a mission with no bosses and you should just be able to back off when you've taken too much damage.
You could also make sure you play on the lowest difficulty to get this with no issues.
A more focused approach in a mission would be to make sure you use cover and dodge. When you use the charge beam you get a small shield in front of you until you fire (holding down the trigger). If you're struggling with any boss missions (the first one for example) wait for a mission with no bosses and you should just be able to back off when you've taken too much damage.
You could also make sure you play on the lowest difficulty to get this with no issues.
If you are playing co-op this is very easy. Put your main character/profile in ghost mode for the entire match and use the 2nd controller to build towers and attack. Even in solo campaign this is easily achievable on your first playthrough. Play the first mission on easy and you should get this no problem.