BioShock - Cheat mode

Effect - Code
God mode - god
Disable clipping - ghost
Flight mode - fly
Disable fly and ghost codes - walk
Teleport to pointer - teleport

Restore hacked robot's health:
After hacking a robot, it will begin firing at your enemies. If the robot gets hit it will begin to lose health, catch on fire, and eventually blow up. To stop this from happening, deactivate the robot, then reactivate it a few seconds later. This should make the robot have full health again.

Defeating Rosies:
When fighting a Rosie, use armor piercing rounds from the machine gun or pistol. For a more effective way of killing, launch frag grenades and run out a door. The Rosie will follow you, fire proximity mines at the door, and when it walks through it will be damaged or destroyed.

Defeating security robots:
If you are up against a stationary security robot RPG, etc., use Telekenesis to grab a crate or pallet. Hold it in front of you until you can find a place to hide and plan what to do next. The item you hold up will block some attacks.

Defeating Atlas Fontaine:
This is the final Boss and he has three different styles of attacks:. Flame Plasmid Form, Ice Plasmid Form, and Electric Plasmid Form. The easiest way to defeat him in the first part is to use your Ice Plasmid and freeze him. Then, switch to your Telekinesis Plasmid. Grab an explosive tank and throw it at him. Also, if desired, just use your telekinesis. He is very predictable if you are far away from him. Wait for him to throw a fire ball at you then move out of the way. He will continue to run past you. Use this chance to fire the machine gun, which does the most damage to him. Once he goes back to his chamber to gain his life back, change to the Flame Plasmid and get ready for some bots. Once he starts his routine of fire and run, blast again him with the Flame Plasmid . The more you blast him, the faster he loses life. Continue to use the machine gun while he is aflame. He will now go back to his chamber one last time. He now has electrical powers. Keep your Flame Plasmid ready. This time, shoot him with the Flame Plasmid and he will run for the water. Once he jumps in the water and comes back out, hit him with it again. Be aware that there are splicers all over as well. Also set them ablaze to get some extra life. There are many different ways to defeat him but this seemed to be the easiest.

Save game recommendation:
After becoming a Big Daddy, make a new saved game. At this point you are near the end of the game. If you missed something you can go to the bathysphere and explore Rapture again, but also you are a Big Daddy now so the splicers will not harm you, security cameras will not set off alarms, etc.