Of course, there are legitimate ways to compress games without any security risk. is a free, open-source tool that safely uses a Windows feature to compress installed game files. It does not modify game code or remove files, so it won't trigger anti-cheat or break your save files, but it can help you reclaim gigabytes of space without malware.
Because Assassin’s Creed 1 is an older title, almost any modern budget laptop or desktop computer can run it smoothly. Minimum Requirements Windows 7 / 8.1 / 10 / 11 (64-bit)