Full list: http://www.gog.com/en/forum/general/games_finished_in_2012_1/post89 3. KKND Extreme (1997)
(PC, 18.2.2012, 8/10)
Finally finished both base campaigns, and the "extreme" extra missions. About time! Overall, this may be the hardest RTS game I've played to date. Not all missions were that hard, but some of them were real killers. The last extreme mission, "Hand of God", made me feel quite frustrated, the enemy just kept coming and coming.
But then there was a divine intervention, ie. my Win7 laptop crashed while I was playing the mission. The crash corrupted all my KKND save games, so I had to restart the mission. Lo and behold, this time I won the mission, by going into a frantic zerg rush mode from the very beginning, instead of the basic "get your defences up, build a counter-attack party, and destroy the enemy", which simply would not work on this mission. Maybe there was also a bit of lucky timing too, ie. my ally base kept the two main enemy attack forces busy elsewhere just as I was wreaking havoc in the enemy bases. That's a mission to remember and tell my grandchildren about.
While KKND (Extreme) is a basic (but hard) C&C clone, it gets extra points for the rather funny (in a Monty Pythonisque way) mission briefings. Here's one example from the extreme mission "Infiltrator" (sorry for the caps, copy&pasted the text from a walkthrough):
"THE ENEMY KNOW WE'RE HERE, AND THEY'RE GOING TO EXPECT A BIG CRUSHING ATTACK WHICH COULD EASILY WIPE THEM OFF THIS PART OF OUR WORLD. BUT WE'RE NOT GOING TO PLAY THEIR LITTLE GAME. WE'RE GOING TO SEND ONE SINGLE SNIPER WITH ONE GUN AND NO ARMOUR TO CLEAR THE WHOLE DAMN AREA. THAT'LL SHOW 'EM."
A tip to GOG: KKND Extreme (Windows) seems to work fine on Win7 64bit, albeit with the "funky colors" problem that many older windows games have, but that's easy to fix. The original KKND (without extreme missions) was a DOS game, so it probably works even better due to DOSBox.
On to KKND 2...