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