Here is the full list of all 33 Rise of the Triad: Ludicrous Edition achievements.
Find Scott's Mystical Head
Defeat General Darian
Kill two enemies with a split missile
Kill an enemy by landing on its head
Beat "The HUNT Begins"
Get to the very end of "The HUNT Begins" end-of-episode messages
Kill a Lightning Guard who previously played dead
Gib an enemy while under the influence of the Shrooms Mode Powerdown
Get an extra life by collecting Ankhs
Kill five enemies with a single God Mode Powerup fireball
Earn a Ludicrous Gibs Bonus
Get some serious air with a firebomb jump without dying
Finish any level with all enemies killed and all secrets found
Beat "Dark War"
Beat any level in "Extreme ROTT"
Beat "The HUNT Continues"
Defeat Sebastian "Doyle" Krist
Defeat the NME
Defeat El Oscuro without eliminating all of his eggs
Defeat El Oscuro while eliminating his eggs
Find the entrance to "Wall to Wall"
Find the entrance to "Turn of the Screw"
Find the entrance to "Elevator Trouble"
Find the entrance to "Eight Ways to Hell"
Find the entrance to "Switched Around"
Enter a warp-only level
Free a moving wall from the confines of reality
Find the Developer Ball
Find the Incredible Ball
Find the Power Ball
Kill three enemies with a Dog Mode Powerup bark blast
Roast five enemies in one firewall shot
Kill five enemies in one level with the Excalibat special attack