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.
Play Single Player.
There are no cities in Minecraft as of yet, only NPC villages which spawn naturally in the game world; cities must be built by the player(s) of Minecraft.
Create a server, then other people can join your game.
Minecraft, Runescape, most computer games and Club Pogo!
TheIronHamster is the greatest player in Minecraft.
You have to register to player the games whether it is the classic(free but outdated) or the more recent one(you have to pay for that). you need o create an account which will enable you to play the game! hope i helped
only sometimes when you create a world you can fly but i have absolutely NO IDEA how to get down.
After you log in, select Single Player and select "Create New World" to get a new random map.
Absolutely not, you can play single player or on a lan connection or if your friend has a server you can play on theirs.
In single player you cannot open the chat box without mods. In multiplayer you press 'T'.
'Seeds' are what the game uses to generate the terrain. Seeds do not create player-built structures like treehouses.
It is impossible to obtain the "MobSpawner" block without the use of mods or inventory editors.