Deep Rock Galactic

When selecting a mission, a red warning will be shown to the right of the image of the mission and will flash in the top right corner when highlighting the mission. This is warning you about something in the mission that will make it more difficult. I recommend playing as host so you can complete the missions from start to finish easily. Also there are no difficulty requirements so you can play them on Hazard 1.

The warnings include:
- Shield Disruption (No shields)
- Exploder Infestation (Glowing enemies that will spawn often and explode when shot or near to you)
- Cave Leech Cluster (There will be more enemies that grab you and pull you to the ceiling)
- Haunted Cave (A ghost-like Bulk Detonator will spawn that cannot be killed)
- Lethal Enemies (Enemies melee attacks do double damage)
- Parasites (Parasites will spawn from killing an enemy)
- Low Oxygen (You will need to often return to the M.U.L.E/Drilldozer/Supplies/MineHead/DropPod to replenish oxygen)
- Regenerative Bugs (Enemies will begin to replenish health after taking damage)
- Mactera Plague (Flying enemies that spit goo will spawn frequently)

Some of the easier ones are:
Parasites - The parasites do little damage.
Exploder Infestation - Exploding enemies can: be easily seen; take a while to detonate, giving you time to move; and are weak (avoid Drilldozer mission though).
Regenerative Bugs - Regenerative bugs is hardly noticeable as you normally intend to kill enemies that you damage. Can be a little annoying on larger enemies.

I recommend that you avoid:
- Shield Disruption
- Low Oxygen
- Cave Leech Cluster (Sometimes fine, sometimes it has been the single cause of failure)
- Haunted Cave (Depends on the mission type, but the Bulk Detonator can kill very quickly)

UPDATE: There are now two new warnings which are Elite Threat (stronger elites appear) and Swarmageddon (lots of swarmers spawn).

Missions can now have two warnings and thanks to magiccigam for confirming that both warnings will count towards the achievement.