I've had a long-standing rule to avoid getting involved in any sort of crowdfunded activities. I didn't donate to Shadowrun or Wasteland, but I did buy and enjoy both of them (I'm plugging both of those games right now, just so you know they're good). I haven't...
Conserve ammo for tougher enemies and don't waste your grenades until you come across a room packed with baddies.
Save often! Max Payne doesn't automatically save your game, so head into the menu and save your progress before any tricky bits.
Listen up: most enemies will have audible conversations, so you'll be able to hear where enemies are and can get the drop on them.