Grimrock

Only a few levels in so far - the ol' "DM two-step" works beautifully, with caveats. One of the problems with DM and even CSB, was that getting quick with the keyboard and not going toe-to-toe was too easy in most cases. I've beaten DM easily using no weapons or armor and just punching eve...

I have a powerful processor but only an onboard graphics card, no dedicated graphics processor.

I momentarily reduced the resolution down to minimum and that solved it for me. A bit of mild frustration/immersion breaking, but not cataclysmic.