First movie:
I think it's a Japaneese production. It's a guess. A group of people (scavengers I think) is going on a island (I think) which is a graveyard of army robots or a leftovers of a battlefield. They go there to scavange some stuff. They get killed by some big robot and a survivors repair one of these robots to fight back. When I say robots they are quite big (not human size).

Second movie:
A scientist in a office building constructd a robot who feeds/hunts on human fear. Some other scientist constructed suit that blocks the fear. A two lads go into the building (not sure why) and got involved in a fight with that evil robot while one of them is wearing that fear blocking suit.

Both mnovies are kind of a calls B I thing. I watched them when I was a kid and would love to see them again just for laughs.

I'm thinking Gunhed (1989) for the first, and
Death Machine (1994) for the second.

Great! Thx for the answer buddy