Duke Nukem: Manhattan Project Cheats and Secrets.


Cheats:

After pressing "~" type:

"Give all" - Gives all weapons (except secret one), key cards, diffused babe, 100 ego, max ammo

"Give nuke" - Give you ten nukes

"Give keys" - Give you all of the keys to the level

"Give bomb" - Gives you free babe. Freeing her does not affect anything other than giving you 20 ego

"Give health" - Gives you 100% ego

"Give secret" - Counts for stats at end of level as if you found them all

"Give ammo" - Gives max ammo

"Give jetpack" - Gives you the Jetpack

"Give forcefeild" - Gives you the force feild

"g_p_god" - God mode

"toggle g_debug" - Debug mode

"Give life" - Gives an extra life

"pause" - Pause the game

"g_map_info" - Map Information

"r_stats" - Display game stats

"camera camera" - Camera can move around the level

"camera player" - Sets the camera back to the player

"Kill" - Suicide

Secrets:

Get all of the nukes on easy to get a more powerful kick

Get all of the nukes on normal and get a blue shirt

Get all of the nukes on hard and get the secret X-3000 lightning gun

Press up at the path near Robo-Duke's right hand (your right) and level 3 of episode 8 
and you will enter a hidden area containing Wozma, the secret boss.