Trying to find an old obscure PC robot game I played as a kid

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Hey guys, I'm trying to find a game I played on PC when I was a kid, probably around 2014–2016, but I think the game itself was older, maybe from the 2000s.

Here’s everything I remember:

- It was third-person, with a fairly close camera, kind of like the close GTA V camera.

- You played as a fully robotic humanoid machine.

- The robot had two legs and moved/runs fairly normally.

- The robot looked relatively sleek/modern for its time, not like a huge chunky mech.

- Weapons were apparently built into the robot's arm/hand rather than something you picked up.

- I remember basically just running around and shooting.

- I think the enemies were also robots/machines.

- I vaguely remember the playable robot changing between missions, but I don't remember selecting it myself.

- I remember one mission/environment that looked like a dark, wet Amazon/jungle, with lots of dense green vegetation.

- The graphics looked like PS2-era graphics, even though I played it on PC.

- I don't remember much HUD/UI — possibly very little or none.

- It wasn't Transformers, Metal Arms, Binary Domain, Gun Metal, Slave Zero, Zone of the Enders, Armored Core, or the other obvious games people usually suggest.

- It felt like a pretty obscure/underrated game. I played it in Iran, so it may have been a game that wasn't very well known there.

I know this isn't much to go on 😭 but this game has been stuck in my head for years.( I'm deadass )

If anything here sounds familiar, please throw the title at me. Even if you're not 100% sure!