For those that are not aware-- Samutz made some major updates on his GTASnP.com site a few months ago and included in this update was a 100% checklist viewable with your save.
So if you are stuck and do not know what you need for 100%-- simply upload your save at the above link.
After you get the message that the save has been successfully uploaded--- scroll down the page and you will see a 100% checklist with everything completed ticked off.
I do not know if he has plans on expanding this feature to other games and/or platforms at this time-- but at the time of this writing, the feature is only available to the following games and platforms...
100% Checklist Visible after upload
- GTA III-- PC, Android, IOS (Unsure of Mac Version)
- GTA VC-- PC, Android, IOS (Unsure of Mac Version)
- GTA SA-- PC, Mobile version 1.06+, PS2
At the time of this writing, this feature is not available for GTA IV, EFLC, or GTA V--- you can check for this feature by clicking the appropriate link on this page... http://gtasnp.com/help/games
Save file editor method
While the above will show you what you have left-- if you are missing a rampage or hidden package it will not tell you which one it is-- Fortunately this save file editor for PC (which also will show you what you need for 100%) includes a map that will show you where any remaining jumps/hidden packages/rampages are located.... unfortunately the last I checked the map DOES NOT SHOW the proper location of missing jumps for the Android version-- all the other features of the editor seem to work ok (ie putting specific cars in garages and the like)...
Save Game editor link--- http://www.gtagarage...ow.php?id=12167
Manual Check Method
For those on consoles-- I created a check sheet that shows you remaining things that can leave you at 99%... It has 2 parts-- the first shows the items that you can check in your stats page and the 2nd shows things that are not in your stats and how you can check them.