HP Games come usually bundled with your device. If you delete them there is no possibility to install them back in their original form. However, since HP is working in conjunction with WildTangent you will find that the games installed on your computer can be downloaded from that website. Since they're in shareware mode, you will need to buy them.
Alternatively, perform a recovery of your system and the games will be restored as new. You can find the procedure and steps to the recovery in the manual of your device.