Prototype Update 49

New prototype update:

• New music.
• Many different balance fixes, difficulty should not be as brutal as before.
• Some new rune powers.
• A few new guns and gun types.
• New gun mods.
• New animations and death effects for a few enemies.
• Maps can now have different modifiers.
• Lots of bug fixes.
• An actual boss (still with placeholder graphics though).
• Level generation for later levels should be a lot faster.
• Some UI changes.
• And more.