Various items can be picked up during gameplay. The portable medkit allows players to heal Duke at will. Steroids speed up Duke's movement, as well as instantly reversing the effects of the shrink ray weapon and increasing the strength of Duke's Mighty Foot for a short period. Night vision goggles allow players to see enemies in the dark. The "HoloDuke" device projects a hologram of Duke which can be used to distract enemies. Protective boots allow Duke to cross dangerously hot or toxic terrain. In sections where progress requires more aquatic legwork, an aqua-lung allows Duke to take longer trips underwater. Duke's jet pack allows the player to move vertically and gain access to otherwise inaccessible areas.