The Total War: Shogun 2 demo is on Steam now.
It's a eye-popping 5935MB (nearly 6GB), so will take a considerable amount of time to download.
What do you get? The Chosokabe tutorial and the Sekigahara historic scenario.
Both, of course, are but a teensy portion of what Total War: Shogun 2 offers as a whole.
We're checking with SEGA whether the Total War: Shogun 2 demo will be released elsewhere.