(I've noticed some people on r/xcom asking for help on where to start, so I'm reposting this from Steam to help.)

If you're new to UFO Defense, here's some links to start you off in the right direction.

A Quickstart guide to XCOM (UFO Defense)

X-Com: UFO Defense and X-Com: TFTD Gameplay Tutorial

Original Player's Handbook (comes with GOG purchase - don't play without reading!)

UFOpaedia page for UFO Defense

OpenXcom's Official Website - Best way to play UFO Defense today

The latest build for OpenXcom Extended, an excellent (and preferable) update to OpenXcom

OpenXcom Official Mods page (OpenXcom Extended highly recommended)

If any UFO veterans are lurking here, please chime in and add any useful links you'd recommend. (Any good longplay session videos would also be helpful!)