ziperto. it is, by itself, safe. just don't click suspicious things, only download from the download links on the individual game pages, and never download an EXE or ISO file. the legitimate files will always be zips

I'm going to delete this in a day, because I'm not sure if I'm allowed to talk about the websites.

note: USE ADBLOCKER AND DON'T TOUCH ANY POP UPS. If anything says it needs to verify you aren't a robot, and it isn't the legit captcha system, immediately exit it. If anything tries to auto download when you are not expecting it to, especially if it says it in an ISO, DO NOT DOWNLOAD IT. Never agree to getting notifications.

I really recommend using the Tamper Monkey browser extension, grabbing a script or three for it to make downloading from Mega Up safe, MegaUp is the best one to download from, but the most dangerous to use if you aren't familiar with it.