A collection of 21 games on cassette for the Atari 400 / 800 / XL / XE computers. All are just the cassette only, no cases or manuals/inlays. They are :

 

The Lone Raider by Atarisoft

Spiky Harold by Firebird

Football Manager by Addictive

Chess by Atarisoft

Caverns of Eriban

First Steps with the Mr Men by Mirrorsoft

Master Games by US Gold (A collection of four games on two cassettes)

King Of The Ring by Gremlin Graphics

Vegas Jackpot by Mastertronic
Periscope Up by Atlantis
Gauntlet by Kixx
Steve Davis Snooker by CDS Software
Nightraiders by Databyte
Zybex by Zeppelin Games
Warhawk by Firebird
Despatch  Rider by Mastertronic
Olympic Skier by Americana
Blue Max by Synsoft
Bounty Bob Strikes Back by US Gold / Atari
The Living Daylights by Domark