This set has two game saves in total. One is for the last ctOS tower and the other is for 17 other achievements with collectibles.
Apart from the achievements requiring you to escape the cops, scans or kill 3/4 enemies simultaneously this save set should grant you the missing cheevos. The only other cheevo missing in this set is the Crimes one but I would assume it will unlock either while loaded or after you stop another crime and the Drinking Games because I'm can't be bothered to destroy my mind even more by attempting to do those:) The Story Campaign is complete.
Anyhoo, this set should net you a perfect 555GS and enable you to get those pesky missing cheevos. Instructions are included in the respective folders.
Also, I would like to point out that this game is weak as fuck and it is mediocre at best so enjoy ;)
Keep in mind that this save pops a lot of achievements on load so at least finish the story campaign before loading the save.
Resign, rehash and enjoy.
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Cheers and have fun!