Huge £30 credit on used (or new!) games

Gamestop are offering £30 credit on used (or new!) games until the end of April. There's a huge list in their magazine. So time to get rid of your old games.
If you don't have much time to search for old games & are desperate for credit for a new console and don't have enough old games to exchange or enough hard cash, you could buy new games like "DS Brain Training" & "More Brain Training" which are on offer for about £13 each in Tescos and therefore get a profit of approx £34 to put towards your new console or games.
Better to find cheaper games though - if you have the time look around Game or CEX etc for 2nd hand games (that are on the list). HTH

Edit: I can't find an on-line site for the UK version of GameStop (only gamestop.ie) & as there's so many games (over 300), maybe those of us with magazines could answer yes or no to those asking if a game is on the list? And maybe post suggestions on how to get the best out of the offer?

Just to clarify, there are just too many games to list:
- NDS approx 80 games
- PS2 " 10 games
- PS3 " 80 games
- PSP " 10 games
- Wii " 80 games
- Xbox360 " 60 games

EDIT!! (11-4-09) Vicks276 has very kindly typed out all 300 game titles - see from post 20 onwards. Thanks for all your hard work!

EDIT (18-4-09) BE CAREFUL if buying games specially or travelling a distance. It seems that some/all (?) of the shops are not now accepting all of the games listed in their magazine. Read the last page or so of this thread for more details.