Day of the Tentacle. The name is funny the game is hilarious. The definition of humor in an adventure game. While I've never been a fan of linear adventures this one is worth a look. Sure the concept itself wasn't anything new.
Kill kill kill while getting better weapons and moving a lot.
All these games have a well deserved cult following and can be found on abandonware sites around. Also realize that Warez sites and Abandonware sites are not the same thing. Heheh it took me to an interesting porn site where the links didn't work either. Honestly people don't buy into the free full download thing. Most of them only get you to a zillion porn links and make the warez site owner a few bucks.