Potato laptop? Same. Try Lord of the Rings, Battle for Middle Earth 1&2. Base game is pretty good, but the mods are absolutely fantastic and transform the game into a AAA title. Also, available for.......free....if you know where to look. Another is the Dawn of War series, but only the first game. Once again, mods keep this game awesome (and way better than the sequels). Command and Conquer 3 Tiberium Wars and Red Alert are some more good options. After that, try KeeperRL. Its a pixel Adventure/Dungeon Keeper style game. Still in alpha, but it is amazing! Also, pretty cheap, with some good mods. Another cheap pixel type RTS/factory managment is Mindustry. Star Wars: Empire at War is another good title kept alive by mods. For FPS titles, check out the Star Wars Battlefront titles. The original ones (and the only decent ones). Another FPS series to check out is the Stalker series. First game is the best, and the next 2 are pretty good. But, once again, the mods created for the game is amazing.