Interlock was a game system by [[R. Talsorian Games]] based on the simplea system of adding a bonus to a roll on a 10-sided die.<ref name="designers">{{Cite book|author=Shannon Appelcline|title=Designers & Dragons|publisher=Mongoose Publishing|year=2011| isbn= 978-1-907702-58-7}}</ref>{{rp|208}} ''[[Mekton II]]'' (1987), the third edition of R. Talsorian's [[mecha]] game, was the first game to use the full-fledged Interlock system, and featured point-based characters with a character background system adapted from the original ''[[Mekton]]'', though in a more complex and comprehensive form called Lifepaths.<ref name="designers"/>{{rp|208}} ''[[Cyberpunk 2013]]'' (1988) was the second design to feature R. Talsorian's Interlock system.<ref name="designers"/>{{rp|208}} ''Cyberpunk'' introduced a new combat system to the original Interlock system called "Friday Night Firefight", while the second edition of the game, ''[[Cyberpunk 2020]]'' (1990), made further improvements on the Interlock system resulting in what is now known as "Standard Interlock".<ref name="designers"/>{{rp|209}}
Interlock is one of the dparents of the [[Fuzion]] system, the other being the [[Hero System]]. The Interlock System is "skill-based"—charactersCharacters are created by choosing skills for them, and by advancing those skills individually, rather than by choosing a [[character class]], packages.as in many other games.
The Interlock System is used primarily in the ''[[Cyberpunk 2020]]'' and ''[[Mekton]]'' role-playing games. A variant of the Interlock System is used in ''[[Teenagers from Outer Space (role-playing game)|Teenagers from Outer Space]]'' and the Japanese ''[[Gundam Senki]]'' RPG.
