Anyone else have this weird issue where they're suddenly given a ton of ammo and health in the final level?

Most of my weapons now have 9999 ammo and I have a good few more health items than I did finishing the last level.

Digging up :)

Same situation here. Last level, plenty of ammo and 69 of every med kit. Didn't see that on any of the YouTube walkthroughs. Maybe it has something to do with completing Peru bonus level earlier, becouse it breaks game statistics?

I'd bet its game bug :)

I assumed it was a "reward" for reaching the last level so you could focus on Marduk and wouldn't have to worry about ammo & supplies haha.

Or a side effect of visiting another plane of existance.

Yup. I give myself the same explenation and just use it wisely :D