Cheat mode:
Pause in any Gradius (under the easy difficulty setting). Press Up, Up, Down, Down, Left, Right, Left, Right, L, R. All weapons and power-ups will be unlocked.
Thanks to Revolution Reader b1ing!

Embark on an inspiring mission of human connection beyond the UCA. Sam — with companions by his side — sets out on a new journey to save humanity from extinction. Join them as they traverse a world beset by otherworldly enemies, obstacles and a haunting question: should we have connected?