When comparing XCOM: Enemy Unknown vs Factorio, the Slant community recommends Factorio for most people. In the question“What are the best Top-Down games on Steam?” Factorio is ranked 20th while XCOM: Enemy Unknown is ranked 24th. The most important reason people chose Factorio is:
With proper planning, users can "code" together very precise ways to create all the things needed for the game, some in very inventive ways that can differ quite a bit. This allows for tons of replayability.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Assortment of add-on content available
There are quite a few add-ons available for XCOM, including the Enemy Within expansion pack.
Pro Effective resource management mechanics
Resource management feels like a juggling act, in the best way possible. Users have to make hard decisions on what options to give priority to, as they all will effect gameplay in some manner.
Pro Death is permanent
Death is very permanent in XCOM, meaning if a player looses a high level player mid game that they may have a pretty tough time advancing past that point.
Pro Endless solutions
With proper planning, users can "code" together very precise ways to create all the things needed for the game, some in very inventive ways that can differ quite a bit. This allows for tons of replayability.
Pro Under active development
The game is still in Alpha which means endless future possibilities.
Pro Massive and infinite procedurally generated world
The playing world is as large as you want to explore, it automatically generates it as you explore more areas.
Pro Cooperative or PvP building
Factorio also supports multiplayer, allowing many players to cooperate and assist each other, or work against each other in PvP. By default, multiplayer games run the CO-OP freeplay scenario where all players work together to launch a rocket with a satellite into space.
Pro Charming old school graphics
While not the most technically advanced graphics the look of the game is much like a game from the 90s but seeing it in action when an assembly line starts moving there is an impressiveness to it that suits the game quite well.
Cons
Con Proper choices not obvious until after the fact
Choices that effect the game are not obvious when they are happening and once realized is too late.
Con Can become rather repetitive
There's really little payoff for being able to build really long chains of automation, it usually results in being able to open a new tech tree which allows the player to continue the process of building automation chains ad infinitum, which, admittedly can become rather boring after a while.
Con Still in Early Access
The game is still in Early Access which means there will be bugs as well as missing features.