While searching for an antidote to cure their allies, players have a variety of weapons-including firearms, clubs, plasma projectors and grenades -- for melee or ranged combat against enemies. Additionally, players will solve mini-games and puzzles, allowing for the option to absorb new abilities that make them more adept at fighting tougher enemies. Players can then build and morph alien DNA chains to improve different abilities like an increased regeneration rate, or enhanced vision.