The Amiga games market was in the beginning of the 90's the most important platform for developing new games. When Amiga couldn't compete anymore a few years later, the market concentrated on licenses, football managers, but fortunately on playability as well, resulting on some very creative and original games: Examples of this are Gravity Power (Pictured), Guardian or Super Skidmarks.

On the Internet there are many games archives:
Back2TheRoots
AncientToys
Atomic Cabage
AtomicLand
All games are stored in Amiga Disk Format (ADF) and readable by all emulators.
Most games are Abandonware, and therefore free to download. Most game music is stored on UnExotica.

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Top 10 of all times (Amiga Power)
1. Sensible World of Soccer
2. Gravity Power
3. Guardian
4. Colonization
5. Dynablaster
6. Cannon Fodder
7. Syndicate
8. Exile
9. Speedball 2
10 Knights of the sky

The entire top 100 can be found on this site The top 3 can be downloaded from MacRetro by pressing the name.