Compression technology (like CSO, ZIP, or RAR) can reduce file sizes, but only by so much—typically 20-30% without breaking the game. To go from is a reduction of over 94% .

Stick to trusted sources (like the Internet Archive’s PSP collection or your own legal UMD rips), and accept that Vice City Stories needs at least to do justice to its 80s neon-soaked, bike-riding chaos. Anything smaller is just a virus waiting to happen.

If a game file sounds too good to be true (94% compression), it almost certainly is. Your phone’s security is worth more than 600MB of saved space.

But as someone who has tested these files and understands the technical limits of the PPSSPP emulator, let’s look at what you’re actually finding on those search results—and why you should think twice before clicking download. First, let’s establish a baseline. The original Grand Theft Auto: Vice City Stories for the PSP (Universal Media Disc format) has a standard file size of approximately 1.6 GB to 1.7 GB in its uncompressed ISO or CSO format.

If you’ve typed “GTA Vice City Stories Highly Compressed 100mb PPSSPP” into Google, you’re not alone. Thousands of gamers on low-end Android phones or PCs with limited storage hunt for this exact phrase daily. The promise is tantalizing: a full, open-world PSP classic squeezed down to the size of a PowerPoint presentation.