This week, I've turned into a total Half-Life freak. So far in the span of 5 days, I've finished Half-Life (so far my eleventh time), Blue Shift (first time, awesome plotline), and Opposing Force (first time too, long and interesting plot); all set on Medium difficulty. And now, I'm looking for more single player mods -- those which have neat plotlines and are enjoyable to play. Also, I'm looking for bots which operate on Opposing Force, Team Fortress, Half-Life Deathmatch, and Deathmatch Classic. I'm on non-Steam versions. And lastly, I'm planning to get myself a copy of Half-Life 2. Is it worth playing? I need to make sure before I spend. So, suggestions please?