I have an arcade site now a days i am planing to make a new design for this. In this new design i need large thumbnail images i.e 150*150 but before they are just 60*60 see some of these: Bush Vs Kerry, Street Fighter, Wet t-Shirt, Tight Pants, Arcade Games, Free Games, Free Online Games and more than 1600 games and some videos are available too on this site. So any idea that i could utilize for enlarge these images? Your suggestions are appreciated...thanks!
You might try doing a live trace in Illustrator - but your thumbnails are pretty small, so the results may not be very good...
There's no easy solution to your problem. What you can do is resizing the images by an even factor (200%, 400% etc) with image interpolation turned off to avoid blurring. This way you'd receive bigger images, that don't lose their sharpness, but pixels would be of course 2x or 4x times the size of a regular pixel. If scaling up without quality loss would be possible, all the images could be saved in 2x2px size and resized when needed