At an underwater nuclear research base, a hostile craft has invaded, prompting Captain Dawnrazer to take action. You play as the captain's assistant, tasked with rescuing the facility and eliminating any alien threats. Deep Core is a dark platform adventure that draws similarities to classic games like Gods.
The gameplay revolves around navigating through nine main levels, each divided into sub-levels and featuring bonus sections. You can access six different weapons, which can be upgraded in power to aid you on your quest. As you progress, the challenges become increasingly difficult, requiring skill and strategy to overcome.