From the team that brought you Aleph One, the classic sci-fi FPS Marathon from Bungie on Mac revived for modern hardware and maintained by the fan community.
I think the big challenge with modernizing it for a new engine is the invalidity to jump (except the grenade jump, of course). A few notable puzzles built around getting around the long way to the top of a a 3’ ledge
You don’t need to change anything other than the graphics and do some quality of life changes and additions. There’s no reason at all to add jump if the original doesn’t have it.
I think the big challenge with modernizing it for a new engine is the invalidity to jump (except the grenade jump, of course). A few notable puzzles built around getting around the long way to the top of a a 3’ ledge
You don’t need to change anything other than the graphics and do some quality of life changes and additions. There’s no reason at all to add jump if the original doesn’t have it.