[GA 0+] Can't remember the name of a game

Hi!

I'm trying to remember (not that I knew it in the first place) the name of this game I saw years ago. All I can remember it was some sci-fi game with a desert (some other planet maybe?) and you had to walk in a mech suit not die (or maybe you wouldn't. Can't tell for sure). The mech was either black or blue. I've seen it between 2002 and 2007. It may be older though, but I doubt it's pre-2000. Then again it was so long ago, so the actual game may be not what I'm remembering :D

Any chance someone knows the game? :)

Also a small train.

Edit:

It was a third-person rpg. Maybe not an rpg, but there were quests. And monsters you could kill and loot. Single player. PC. And that mech/suit was human-shaped, with legs, arms and a head. Nothing boxy with chicken legs like AT-ST.
Can't tell much as I haven't played the game. Only briefly saw a friend playing it.