Each game is different. Check the game's website or documentation.
No
Mods are people patrolling the Site/games to make it fun and safe.
no
invincibility 12345
You don't computer game mods will not work on the PS3 and the PS3 USB port does not go to the games section of the PS3 hdd to allow uploading of games, add ons, or mods
Mods are edits in the games original coding to enhance gameplay or for a player to gain an advantage over other players making the experience unfair. Mods are illegal in some games but in others such as Call of Duty: Modern Warfare for the PC mods are encouraged and a dedicated server is running for these modded maps/weapons etc. to be played by other players. Okay, let's make this clear. Mods aren't illegal in games and most mods add additional functionality as opposed to simply changing the existing code. Mods are almost never done at a code level anyway, but at a scripting level instead. In multiplayer games, mods would generally get you banned from servers they're not allowed in, but most games that support mods are clever enough to load mods and unload them as appropriate. Let's also be clear about Modern Warfare. Whilst it certainly supports mods, it never truly encouraged them, as it took many updates to even allow options to show modded servers in the serverlists.
Marvel mods are modifications or alterations made to video games or software related to Marvel Comics characters and stories. These mods can add new characters, costumes, abilities, or storylines into the game to enhance the player's experience.
Based on my experience, no they dont.
You can't make a "single player just for mods." All of your data is stored in the exactly same place and mods affect every single world. If it is a mod you can turn off then there is your answer.
You can only do it on HALO 1 on the Computer with mods.
Of course, mods are the spice of video games... just don't expect multiplayer to work with anyone who isn't using the same mod.
The PS3 will not play PC games and PC game Mods will not mod a PS3 game.