I plan on buying these soon and I want to know so this way I can buy a 2600 too if need be.
The following Atari 2600 cartridges are incompatible with the 2600
Adapter:
Texas Chainsaw Massacre - JH
Most Tigervision titles - 19 (but Miner 2049'er works - JH)
All Supercharger games - 19 (will work, but only if cover of
expansion module has been removed) - 26
Taken from here:
http://www.overclocked.org/emucolecofaq.htm
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Klingons Invented Saran Wrap