Does reseting the cache disrupt any achievement progress or make some more difficult?

[Zenquen]

I am not sure what all reseting the cache does but I have heard people say reseting the cache messed things up in oblivion and two worlds for them, i don't know if it is true or if they are just being loud mouths.

[Lucent Beam]

If you clear the cache, it deletes all the patches/updates you downloaded on your system. Not sure about in Oblivion or Two Worlds, but I clear my cache a lot because of synthing offline in Kingdom Under Fire & I've never had it screw up any game for me.

[Artamus]

I don't know about Two Worlds but it definitely won't do anything to Oblivion, other than not being able to play if you had started the game with all patches installed.

[MajinFro]

it "shouldn't" do anything because the cache overwrites information stored in it i.e. having to redownload an update because you played a couple games since you last played the updated game.

[GameFreak47]

I'm 99% sure it doesn't effect Oblivion in any way. Atleast not in my expierences. Two Worlds, I don't know for sure.

Clearing the cache only removes any patches or updates your console has recieved. It doesn't mess with your game data in any way whatsoever.