When comparing Endless Sky vs UFO: Alien Invasion, the Slant community recommends Endless Sky for most people. In the question“What are the best open-source games?” Endless Sky is ranked 18th while UFO: Alien Invasion is ranked 37th. The most important reason people chose Endless Sky is:
This game is free to play and distribute. It also has a large developer base that works to solve all issues. This also provides endless possibilities to expand the universe by adding new missions, alien species, planets, etc.
Specs
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Pros
Pro Open source
This game is free to play and distribute. It also has a large developer base that works to solve all issues. This also provides endless possibilities to expand the universe by adding new missions, alien species, planets, etc.
Pro Cross-platform
This games runs on Windows, Mac, and Linux.
Pro Low system requirments
This game only requires 350 MB of RAM and 65 MB for storage.
Pro Heavily influenced by the X-COM series
For the die-hard fan of the original X-COM series, this is a must-have. Updated but minimally changed version.
Pro Multi platform
Windows, Linux and Mac versions.