I finally managed to find a complete list of all the games published by Strategic Simulations Inc. (SSI) for Commodore 64. I have many of SSI catalogues but I never had the time scan them all to create an actual chronological/historical releases list.
This morning I stumbled into an old geocities page hosted somewhere else with this list, which, as far as I know, was compiled by author of this site here. I don't want to be credited for this and I just thought that such important summary should be shared with you all.
The slightly rearranged file has been placed here and it can be downloaded at your convenience.