What are milestones and nightlies?
How do I manually install OpenXcom?
How do I install a nightly?
How do I install mods?
How do I use mods?
How do I update OpenXcom?
Can I make a portable installation?
Can I have multiple standalone installations?
How do I know I installed a nightly correctly?
How do I reset my options when my game won't start?
How do I do a complete fresh install of OpenXcom?