Well, yes but Deus Ex had a bunch of complex game systems, like an inventory, or RPG stats, that stopped players from picking it up and playing right out of the box. NOLF1, on the other hand, while it had more depth than your garden variety FPS, could be played like your average run and gun FPS. In fact, a guy I knew did just that, playing NOLF1 from start to finish as if it was Doom.