Analysis of information sources in references of the Wikipedia article "Bionic Commando: Elite Forces" in English language version.
With Bionic Commando, you start with a short life meter, but it gradually grow as you kill enemies. Also after each stage, a weapon or item is added to your arsenal. These elements give you a bit of an RPG experience similar to games like Super Metroid and Castlevania: Symphony of the Night. And much like many Metroidvania games, you often explore the expansive levels by traveling in a variety of directions.