Twilight 2000 4th is very much a tactical game, and the combat is very good and fun to play and run. There is a huge support on drivethurpg.com under the Free League workshop for third party suport with everything for setting, other than the survival setting of the game, to very extensive campaigns. Price-wise, for that stuff is from free to over 30 bucks US. But a lot of it is very worth what you get for the prices. There is a character sheet also on here that you can use, and the game can also support solo play, with rules in the back of the GM book, I think.