What's the deal with some Namco games having NAMCOT in them? Why the T?

As far as I’m aware, NAMCOT was a department of Namco that was set up to handle games released on consoles (as opposed to the arcade). I think - as with everything there’s a possibility that I’m wrong.

A fickle Frankenstein from Kid Dracula, Game Boy.

A fickle Frankenstein from Kid Dracula, Game Boy.

RoboCop 2, arcade.

RoboCop 2, arcade.

Die Hard, PC Engine.

Die Hard, PC Engine.

Knights of the Round, arcade.
Phelios, Genesis / Megadrive.

Phelios, Genesis / Megadrive.

JuJu Densetsu (Toki), Megadrive.

JuJu Densetsu (Toki), Megadrive.

Air Buster, Genesis / Megadrive.

Air Buster, Genesis / Megadrive.

“Easton Kingdom” from Super Smash Bros. Brawl.

Chase H.Q., Game Boy.

Chase H.Q., Game Boy.