Hero Core is actually pretty fun to play, and it seems to be good for TASing as well. I made a test TAS earlier,
here's the movie file (and
here's an encode that I already linked to elsewhere). This is only an any% run on Normal difficulty, so it's possibly the least-interesting type of playthrough. Each difficulty mode in this game takes place on a completely different map (and at least one of them has unique story elements and boss battles), and they could have 100% runs done of them too.
The movie file was recorded with
Hero Core 1.1 but it syncs in 1.2 also. This game's "fullscreen" mode doesn't work that well in Hourglass, so (if you don't use the 1.1 version I just linked to, which is pre-configured) I suggest setting the game to run in windowed mode first, otherwise you might not hear any sound. You have to change the fullscreen setting in the options/controls menu and then back out of the menu before quitting in order for the change to be saved.
Oh, and
here's an encode of the (secret) hardest difficulty mode that I also posted earlier. I haven't gotten this one's movie file to sync in the latest Hourglass yet. One interesting note is that the game's author actually made a TAS of sorts of this same difficulty mode and put it on Youtube
here. (Not having Hourglass, he used a version of the game that he modified to have savestates and slow motion and some amount of automatic player movement.) I'm pretty sure my version is much faster, and yet, still far from optimal because this mode is so incredibly hard even under TAS conditions.