Here is the full list of all 13 Metal Dead achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Kill the source
Not even Arnie could survive that
Perfect balance of hot and cold
Smoke the giant bud monster
Kill the baby plant
Mess around with some household chemicals
Complete a mind-numbingly menial task
Revive an old friend
Open the wrong crate
Introduce tire iron to cranium
Mess around a little too much
Happy accidents will happen
Maybe you should knock first