Turok - Dinosaur Hunter (U) (V1.0, V1.1, V1.2) savestates are unstable. Randomly, (more common if you reload repeatedly and quickly), loading a savestate will cause Dlists and Alists to stop processing (0.0%) in a second or two, making the game hang. Resetting and waiting a few seconds before re-loading the savestate may fix it, but sometimes reloading from native save is necessary. Other savestates will hang too when this happens, seems to stay persistent in memory until a reset.
Turok 2 (U) [!] savestates cause Alists to stop processing randomly when reloading, again more common if you reload repeatedly and quickly. Other savestates will be affected when this happen, stays persistent in memory until a reset.
Sometimes, Dlists stop processing, causing the game to hang (cannot reproduce, seems to be tied in with the Alist + savestate issue). Only fix is to reload savestates until Alists stop processing, since the game won't hang then, to make a native save.
I bet Turok 3's the same, if the first two are any indication.

I'll find out when I beat 2...