First, let's clear the air. ChessBase 11 is the older, stable, and (some argue) more intuitive version of the famous database software. The "Reloaded" tag usually refers to a repack that includes not just the software, but a massive collection of databases—often Millions of games from 1500 to 2012.
The "Portable" aspect is the magic trick. This version has been modified to run entirely from a folder. No registry entries. No installation required.
You can load a game, press F12, and the portable engine will annotate the entire game with positional evaluations, threats, and blunder alerts. The results are saved directly to the portable database file without touching the host PC.
The package typically includes: