When comparing Spintires vs Factorio, the Slant community recommends Factorio for most people. In the question“What are the best Simulation games on Steam?” Factorio is ranked 4th while Spintires is ranked 14th. 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
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Pros
Pro Unique title
You do not see games like this much, it is kind of niche product. As going trough rugged terrain with hulking Soviet machines tends to be a pretty niche genre/style of game.
Pro Has Steam Workshop support
You can get all the mod's etc through Steam Workshop, which creates a community where one can enjoy the added elements brought forth by the available mods.
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 Camera can be unweildy
There is no cockpit camera view in the game, the only camera view is this odd over the shoulder camera that can make it tough to see what one is doing while driving. It does help when trying to hook up to and pull another truck out of the mud, but an additional camera view would be helpful for driving in particular.
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.