I thought I might give some useful tips or rules for the Marathon Trilogy. Some rules or tips may only apply to a certain game, I will put a note on the side to alert you. Eg: Frog blast the vent core! (M2). Feel free to leave suggestions for new rules/tips. 1. Don't run in guns blazing unless you have health to spare 2. Always restore health/shields when you have the chance 3. There are always bigger guns nearby 4. There are always secrets 5. If a BOB is happy to see you, kill it (M1) 6. If the floor isn't full of dead Pfhor then you haven't benn there 7. If the room/area has Pfhor in it then you haven't been there 8. If you haven't been there then you haven't been there 9. When in doubt, [u]USE YOUR MAP[/u] 10. No level is easy 11. Never underestimate the versatility of the .44 MEGA Class. 12. Don't even try to grasp how to reload the Combat Shotguns. 13. Save your shotgun ammo (M2) 14. Don't abuse the W key (Or whatever key you use for run). You run at about the land speed record, not a snails pace like most modern shooters. [Edited on 10.18.2012 2:52 PM PDT]