YMMV / Half Life On A Rail

• Arc Fatigue: This is a Marathon Level whose main gimmick (the trams you can drive) will probably get old long before you get to the end.
• Big-Lipped Alligator Moment: The "background crying noises" that are heard twice during the level.
• Demonic Spiders: While there's only one for now, this chapter introduces the deadly H.E.C.U. sniper enemy.
• Gameplay Derailment: As noted on Half-Life's main YMMV page, many players will find the chapter easier if they simply abandon the tram, only returning to use it to smash barricades when such is necessary to continue.
• That One Level: This chapter is unpopular, due to it's length and tedium. It's an extremely difficult chapter since there are many hiding spots for enemies and plenty of times where you will get ambushed. What makes it even more difficult is that health and ammo are sparsely located around the level.