1GB Games on 512mb RAM Windows phones

Hello.i have lumia 720,512mb ram,and i saw a trick which is rly useful,117.135.139.179 proxy wifi change,with this i downloaded good apps that can be installed only on lumia's 92x(like nokia camera..) but when i try to install 1gb ram game,it works good,it starta downloading,and work fine,but at the end of downloading,error shows..Does anyone else have this problem,or know how to fix this?

P.s games like sims freeplay or real football

In my opinion don't mess-up with games as 1GB RAM demands more memory, may be your phone get hanged or faulty or overheated or faster battery drain.
Anyway you are wise person its your choice anyway.

Only works with Windows Phone 7 stuff.