0.6.7

Grenades as secondary weapon, and graphical enhancements

Game

• Add secondary weapon system (#33)
• Add diagonal direction stickiness (#457)
• Add option to remove blood (#544)
• Fix unpausing not ignoring first key press (#548)
• Fix compass arrows in shared camera view (#530)
• Improve some sprites with semi-transparency

Misc

• Add Windows .zip release (#425)