A complete ROM pack gives you access to over 700 official games. If you do not know where to start, these definitive titles showcase the best of the 16-bit era: Platformers and Action
The most trusted name in ROM archiving is . This group curates "verified" dumps of cartridges that are bit-for-bit identical to the original. When searching for an "all games pack," look for the "No-Intro Sega Genesis (Mega Drive) 202x" set. These are considered the gold standard because they remove bad dumps, hacks, and duplicates.