Yes, Lifesteal Fist is considered a critical hit in Elden Ring. It is described as a slow, controlled punch with an energy-infused fist that renders foes unconscious and steals their HP, making it effective against specific types of enemies. It uses the same animation as a normal riposte, making it vulnerable to the same conditions as a critical hit. Lifesteal Fist can trigger charms and abilities designed for critical hits.