Cheat mode:
Press Up, Up, Down, Down, Y, Down, Up, Y at the main menu screen. A cheat option will appear at the title screen. Pick it, then enter one of the following case-sensitive codes for the corresponding effect.All levels and emergencies:
Enter KEYTOTHECITY as a code.Long range stungun:
Enter FRYINGTIME as a code.Minigun instead of pistol:
Enter MINIFUN as a code.MK3 assault rifle w/ unlimited grenades:
Enter ULTIMATEPOWER as a code.MK4 pistol:
Enter ZEROTOLERANCE as a code.Bullets set enemies on fire:
Enter BURNINGBULLET as a code.Thermal breather MK2 has better visibility:
Enter ISEEYOU as a code.Squeaky voices:
Enter WHATWASTHAT as a code.No heads:
Enter KEEPYOURHEAD as a code.Disco mode:
Enter DANCINGFEET as a code.Terror mode:
Enter BURNERSREVENGE as a code.Completion bonuses:
Successfully complete the game to unlock the Terror difficulty setting and another level of medals.
Thanks to Revolution Readers Bilbo, INKO5, Bobobobob, and 5tone!

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?