Interlock Revised, Repaired, and Re-Examined
From the introduction:
Interlock Unlimited is the culmination of [years of gaming], as well as the collective experience of the online community. In addition to my own house rules and replacements, I scoured the net for the best ideas and house rules available. Compiling them into one place it soon became apparent that what had always been missing was a basic set of rules, one usable for any genre, any setting.
Interlock Unlimited is a re-imagining of R. Talsorian Games, Inc.'s Interlock System, and as such was designed not only to cover any genre, setting, or situation, but remain fully compatible with all games built on the Interlock System.
N.B. Despite the name, compatibility, etc., this is a fan created and published game system and was produced "without permission" of R. Talsorian Games, Inc..