Some packs consist of tiny, simple puzzle or browser-style games (like Solitaire or Tetris clones). Web Link Shortcuts:

Archive.org lets you play 1,000s of DOS games directly in your browser. No compression needed; you stream the game logic. This is the to the keyword.

If you're looking for games to download, consider the following:

When you see a 10MB package containing 1000 games, you are typically looking at Retro ROM Collections