Use some ingenuity to open blocked doors
You’ll need to find keys and passcodes to unlock a lot of doors in Cronos: The New Dawn, while others are locked from the other side and can be opened from the other side as you work your way through a level. However, some doors simply have obstacles keeping them closed, meaning you’ll need to think outside the box a bit.
When you come across a door that won’t budge, take a look around to see if there’s a sightline into the room from another angle. Often, a window or broken wall will let you see what’s blocking the door. Perhaps it’s wood that you can clear with a well-placed shot, or some biomass that can be cleared by shooting a nearby fuel canister.
In most cases, these doors will lead you to a comic collectible or some useful materials, so you’ll be thankful you took a moment to clear the way.