if I suggest u to make wgames similiar to ngage application.
what I mean is . I had installed most of games under 10 gb optify manually and using deb package of course.
so why u dont put execution file manually for anyone who installed first befor this application released.
e.g I put mygame under /homeavuser/game so u can add execution file such as /home/user/game/com.ea.nfsuc.app/nfsuc
and one more suggestion to make it similiar to ngage while first open application u can see list if game installed of course click it will start the game scroll to right it will change to manage game (delete and install )and save