Go for Tentacles it has easy achievements but a bit time consuming. Half of the achievements are easy and quick grab whereas others are time consuming (a generalized statement for Xbox Games). Recently many gameloft games got Xbox integration so you can download them as well. Wordament and Snap Attack are good and do give few achievements very easily. Not much but when combined you can get 100G from both combined.

Few good games on Windows Phone in general

Age of Empires Castle Siege

Rayman Franchise (As good achievements )

Contre Jour

Mirror's Edge

Most of the free Xbox games by Microsoft do provide quick achievements in beginning so download them and play few quick games and you will be able to gain achievements if you like them keep them or just delete them.

BTW which wp phone are you using and overall impression. If looking to customize download Skyward tiles app it is good. Try it

Any Mozilla Firefox users my Firefox has been performing slow from past few days and since I dont like Chrome I would prefer to use Firefox, I cannot even use IE 11 because it is not working due to some error. Moreover Firefox has been now using too much resources from my PC

I am very hardcore IE user, people keep on calling it bad but I don't care for me it is the fastest browser, I occassionally Firefox but it has been recently performing very slow basic websites are taking time to load. 

Look at this situation you are facing the same problem I am but the difference is you are facing it on Chrome and I am facing it on firefox and due to this we have changed places I am currently using Chrome and you are using Firefox.

In terms of speed which one  do you feel is better Firefox or Chrome.

Downloading Pale Moon lets hope it is a good browser.

I was wondering since universal apps are now coming to Xbox as well will Project Spartan make its debut on Xbox One

Anyone wants this?

''FREE: Up to 100 Free Skype Minutes''

That would be useful to me

Why is Jay banned and when I click on Jay's profile it takes me to the members page rather than taking me to Jay's profile can anyone confirm whether its an error on my side or not.

According to this ign article, Halo 5 has a chance to release in September.

http://www.ign.com/articles/2015/02/11/podcast-unlocked-182-will-halo-5-release-in-september

You need to be friends with Jay to vies his profile

Just looking at recent memory Destiny proved September can be a huge month. Also MSFT will probably get COD advertising for November anyway, let halo get the jump.