This game can be: Modified through legal and official external sites.

This game can be: -Cheated (Keyboard commands, not external).

This game, like it's predecessor, can't be hacked or altered.

This game can't be altered in any way.

This game can't be altered. Workshop items don't count.

This game can be: -Hacked -Cheated -Modded (with workshop).

This game can be: -Cheated (internal time changing).

This game can be: -Hacked -Modded -Cheated. All work through external programs and configurations.

This game can be: -Cheated (through certain keyboard commands, not external programs) -Modded.

This game can be: -Hacked (multiplayer bannable) -Cheated (multiplayer bannable) -Modded. I count the Rocket Multiplayer Plugin as an acceptable mod, as it is used across many multiplayer servers.