"The Japanese term Tsundere refers to a character who "runs hot and cold", alternating between two distinct moods: tsuntsun (aloof or irritable) and deredere (lovestruck). The equivalent English term, at least during The Roaring Twenties, is "bearcat". The tsuntsun can range from the "silent treatment" to "lovestruck kindergartener who pushes you into the sandbox." The reasons behind a Tsundere's behavior vary widely. Some are reasonable justifications. Others simply flow from the conflict between their feelings about the object of their affections and their reactions to having them.

Type A (alias Type Tsun or harsh): These Tsundere have tsuntsun as their default mood. It takes something special to trigger their deredere side. It's about which part of the tsundere personality is the public face and which the hidden. Classic tsundere characters tend to start out aloof and avoidant with fiery tempers but over time they will begrudgingly show a gentler, more easily flustered lovestruck side to the right person. This is the "bear" in "bearcat".

Type B (alias Type Dere or sweet): These Tsundere have deredere as their default mood. They are sweet, kind and generous, but just happen to have a hidden violent side as well. In this case, temper is almost always triggered by someone or something else, usually a Love Interest. This is the "cat" in "bearcat".

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Fun fact about myself: I use to like this trope when I was a kid. No idea why but I don't feel this way anymore. But I obviously don't dislike a character because they are considered a Tsundere. I still like plenty of them, it just not my favorite trope anymore.

I just had this random idea to make a list of character tropes. So here we are. Plus it helps find games I've never heard of.