what's this offline client and where do I get it?

thanks man, it fixed the issue, I'll add it to pcgw

again thanks for the quick reply for such an old unknown game, i really appreciate it

I tried this game out, the camera movement is fine but any movement or ingame animation plays at like 10fps, is that how it's supposed to be? I had a look at the speedrun guide but this issue isn't mentioned at all, only seen it on a youtube comment somewhere with no solution.