Action

This is (part of) my complete collection of Action comic.
Action was an infamous UK comic that was printed weekly in the UK between 1976 and 1977.
It was extremely gory and violent, taking its themes from the movie trends of that period. For example:

'Hookjaw' a giant killer shark, inspired by the popularity of Jaws. 

'Dredger' a law enforcer who looked and acted very much like Dirty Harry.
 
'Death Game 1999' a Rollerball type game, stealing its title from Death Race 2000. 

'The Running Man' a man on the run from the Mafia, who looked a lot like Dustin Hoffman in Marathon Man.

In other words, essential reading for a twelve year boy. 
It was a departure from the standard UK boys comics of the day, which were generally all about WW2 and football.
I started buying it in February 1976 and by the autumn of 1976, The Sun newspaper ran a huge story, detailing in full journalistic hyperbole how violent and anti-establishment it was. (They dubbed it 'The Sevenpenny Nightmare') In October it was banned for a short period and returned shortly after in a more toned down format...same themes...less blood spattered pages.
It was combined with war comic Battle towards the end of 1977 and the magic was over, but, I had my complete collection- start to finish.

1977 was the year of Star Wars and the creators of Action, Pat Mills and John Wagner, again looked to the movie world for inspiration, returning with the more futuristic comic replacement, 2000AD.

2000AD gave us Judge Dredd and became a huge publishing success. The pool of talent behind it are regularly poached by DC and Marvel and 2000AD is still being published to this very day.
However, I still have a fondness for my small collection of the cult comic that paved the way for 2000AD. It broke new ground, but has somehow been forgotten.

But maybe no longer. I read recently that Hookjaw is getting a revival which will be published by Titan comics by the end of 2016.  
A forty year wait to read Hookjaw again. I hope it's worth it.

(Not to be confused with Action Comics, the US comic that introduced Superman in 1938. Issue #1 of that publication is worth three million dollars)