Deus Ex

Deus Ex is the epic story of a sunglasses-at-night guy who drinks soda he found in back alleys, gibs little Chinese boys with rocket launchers, lets gangbangers murder a man's daughter then says to him "What a shame", and discovers A BOMB in a helicopter.

Debug Menu
Once you've enabled cheats by adding -hax0r to the command line arguments, enter the console command "legend" to open up an in-game debug menu.

Load Map
Self-explanatory - load any map in the game. There is a "travel" checkbox, but I'm unsure what it does.

Edit Flags
Allows you to view and edit any and all event flags set by the game.

Add Dump
Pops up an error message about CurrentUser not being properly defined, then kicks you back to the debug menu.

View Dumps
Pops up an error message about there being no dumps to view.

Invoke Con
Supposedly a tool to force NPCs to play their conversations and AI barks.

View Quotes
Launches a secret credits-style scroll sequence (normally accessed by typing a message dyring the credits) featuring various quotes from throughout development. Yay!

Play Music
Allows you to listen to all the music in the game, along with all their variations (action, conversation, death etc.)

Female JC
While the idea would be implemented in the sequel, it was here since the beginning – the titling of the player model as "JCDenton.Male", the choice of the gender-neutral name JC, and the fact that your gender is rarely referred to (i.e., guards saying "Did you see that? Looked like a guy in a baggy coat." when you're spotted).

Ford Schick
After you save Ford, he says he'll return to the Smuggler's Lair but never actually does. This is because the flag that gets set when you rescue him is (mistakenly?) set to expire at the end of Mission 3 (the hangar mission). If you go to the lair during Mission 8 and use the command "summon fordschick", however, he will appear.

Ford has a set of complete and recorded conversations thanking the player and offering advice on what to do, complete with offering the character aug upgrades.

"White House" Level
A level that was scrapped early in development, but contrary to speculation was not due to government intervention. Rather, it was deleted because "a few thousand little square rooms would be really boring".

Some of the furniture models were completed, and can be summoned (prefix "WH"). Also completed were the high-detail models of the President and his wife, who in the final game appear in the opening video for two seconds at a distance.

Airport VOIP Conversation
Tne8dUOjk-s In one of the offices in the terminal, the player originally could have accessed a VOIP conversation between Juan Lebedev and Tracer Tong. Tong will be trying to convince Lebedev to kill the player, whereas the former insists on keeping him alive.

Answering Machine in Paul's Apartment
An answering machine in Paul's apartment would have foreshadowed his loyalties to the NSF when it is used by the player.

Renamed/Repurposed Objects
Many of the otherwise final items exist, but summoning them reveals they may have had entirely different concepts than was finally implemented. For example, the electronic scrambler grenade used to confuse bots is named "WeaponNanoVirusGrenade", indicating it would have possibly been some kind of highly-lethal version of the gas grenade to infect humans with Gray Death.

Cat Bites
Within the list of NPC-specific attacks is a listing for cat bites. Unlike dogs (which do bite you), cats simply run away when you step on them.

PowerVR Support
GpTsU5dlqd4 Deus Ex, like most Unreal Engine 1 games, uses a plugin system for its renderer, so as to allow more flexible support for multiple video card types. Interestingly enough, the PowerVR SGL plugin, while dummied out, is present, compiled for Deus Ex, and works fine with minor bugs. Of course, you actually need to HAVE a PowerVR card to use it, and you'll need to have Kernelex 4.5.1 installed and the game set to Windows 98SE compatibility mode.