In a long gone year 2002, a great game was made, called Crimsonland.
You are playing as a man, which alone survives against a horde of monsters, finding weapons, ammo and different items along the fight.
Unfortunately the end is only one – death. It only depends how long can you manage to survive.
Crimsonland was first made free (last freeware version was 1.40), and later became fully paid game (1.9+).
There are different old versions scattered on the net. Here are 3 free versions I could find:
All of them run fine even on modern systems and in x64 operating systems.
It’s a great game you can enjoy even during a lunch break at work.