This game is comedy at its heart, and so, it really demands that you play stealthy, not because of XP boosts or extra loot, but because otherwise you're going to miss all the anecdotes, and ridiculous dialogue that the enemies share. But it's also not really a stealth game--you'll either have to learn the enemy patrols or save scum your way through it--it's definitely a comedy from the 2000s, and so some of its comedy hasn't aged well, but the script, cutscenes, music, and main voice roles are all wonderful. This game is a cult classic for a reason, and I hope it gets a remake sooner than later.