Here is the full list of all 21 El Paso, Elsewhere achievements.
Get the "Thanks for Believing" ending.
Defeat Draculae.
Roll 150 times.
Kill 5 hostages.
Kill the Burned Man.
Collect the Launcher.
Kill the Angel.
Collect the Uzi.
Kill a mega enemy.
Heal 50 times.
Hit 1,000 weak points.
Kill the Puppeteer for the first time.
Save 10 hostages.
Clear the first Landmark level.
Clear the tutorial.
Find all Pill Cop segments.
Find all projectors.
Defeat Djedefre.
Get the "Scars Fade" ending.
Stake 250 enemies.
Dive 150 times.