When comparing Crusader Kings 2 vs Garry's Mod, the Slant community recommends Crusader Kings 2 for most people. In the question“What are the best singleplayer games on Steam?” Crusader Kings 2 is ranked 67th while Garry's Mod is ranked 112nd. The most important reason people chose Crusader Kings 2 is:
The game allows for one to make their own choices with there being many "win" conditions in that you can choose to progress how you like. Want to take over all of Europe, that is possible, want to create a successful lineage of family that keeps to themselves, this is also possible.
Specs
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Pros
Pro Freedom to play how you like
The game allows for one to make their own choices with there being many "win" conditions in that you can choose to progress how you like. Want to take over all of Europe, that is possible, want to create a successful lineage of family that keeps to themselves, this is also possible.
Pro Massive online multiplayer
Crusader Kings II has a whopping 32 player online multiplayer mode. Something not often found in games of this sort which can make for a very intense and strategic gameplay session.
Pro The games mechanics and mods allow for ridiculously funny gameplay
You can do some really crazy things in this game thanks to all of the community mods available as well as the built in, in game tools. Pretty much any scenario can play out in the game, if you so desire. Of course the winning combination of funny tends to be when players are just goofing around.
Pro Tons of community made add-ons allows the game to continually grow
Garry's Mod has a wide variety of community made add-ons, which deeply extends the games content and versatility. Pretty much, if you can think of it, someone has probably already made it.
Cons
Con Extremely complicated
Crusader King II is a very complicated game that seems overly complex at first and may take a while to really learn as there are quite a lot of things to not only balance in the game but also figure out how to do either through in game tutorials or reading online.
Con No naval battles
No naval battles, which reduces the advantages of being an Island nation.
Con It has nothing to tell as a campaign. Tastes like void, that is "meh".
Con Previously free to download
Garry's Mod used to be a free download but it is now a paid game on the Steam store.
Con Tons of bugs
At least in earlier versions.