Pizza Connection
Designing your restaurants, come up with your own weird Pizzas and bombing/gassing/rocket shooting your opponents restaurants and dealing with the mafia while being mean to your lazy employees. It's a fun game (i like the humour in the caricatures, there's just something funny about buying meat from Rambo, buying 'fresh ice cream from libya' (weapons of course) from Erich Honecker and having Spock as Mayor of Berlin) that still holds up.
It's just a bit too easy once you figure out how it works or if you just get rich from illegal weapon trades.
It's a shame the sequels were so bad. Pizza Syndicate could be great if the graphic style and interface wasn't so horrible. PC2 was too dumbed down and limited and PC3 is sadly a broken, unfinished mess.
In general i have a soft spot for the 90's/early 2000 Tycoon games. Mad TV (best TV manager ever, such a shame the CPU opponents are way too easy), Biiing (running a hospital with all hospital tropes imaginable and a lot of sex, it's also very challenging difficulty wise), Wet: The Sexy Empire (starting with porn shoots, then creating your own porn studio, then running a sex shop chain), Ports of Call (absolute classic), American Dream (Burger chain), Oldtimer (even if it was released broken and never fixed, thus its unplayable after 191

, Detroit (Oldtimer done slightly better) and Hollywood Pictures (running a cinema, also making your own movies), Theme Hospital (everybody knows that one, Biiing was still better thanks to the wacky humour and bigger challenge), Zoo Tycoon (but of course Planet Zoo is way better objectively) and of course the monumental epic that is Rollercoaster Tycoon (and it's even better sequel). A lot of those games, especially the 90's ones weren't very good because ultimately it's just a excel spreadsheet with graphics and usually easy to figure out how it works but it's always fun to start a business and see it grow.