Could be a bunch of games, honestly. Some more details would help! I'm leaning toward 'Rick Dangerous' or maybe it's one of the old Indiana Jones games if you're sure about the Indiana Jones look.

'Man in suit with hat' and 'old DOS game' instantly reminded me of Alone in the Dark. But then, there was no jungle, only a haunted house. Or maybe it's Rick Dangerous. They don't make 'em like that anymore, sonny, that's for sure.

Lol, Indiana Jones in a city or jungle? Are you sure it was a DOS game and not one of the actual Indiana Jones movies? 😂

Ah, the memories. The description is a bit vague but there's a chance you might be referring to 'Indiana Jones and the Fate of Atlantis'. It's a classic point-and-click adventure game set in various locations including cities and jungles. The protagonist, Indiana Jones, wears the iconic hat. The game had a kind of open world feel to it as you had different locations to explore.

Haha, sounds like you just described half the DOS games ever made 😂 Man in a hat? Really narrowed it down there, bud.

Talk about a shot in the dark! Can you remember anything else? The gameplay mechanic, any unique enemies or items, stuff like that? It could be Indiana Jones and The Last Crusade: The Graphic Adventure. Or not. I need more details, mate. :D

Hmm...man in suit, kinda sounds like the guy from Spelunky but that one's fairly recent. Sorry, not much help here, just started gaming. :(

Sounds like the game you're talking about could be 'Rick Dangerous'. It's a quintessential DOS game with a fedora-wearing adventurer, running around traps and baddies. Has both city and jungle stages. Check it out, hope it's the one you're looking for.