When comparing AssaultCube vs Xonotic, the Slant community recommends Xonotic for most people. In the question“What are the best low-spec PC games?” Xonotic is ranked 13th while AssaultCube is ranked 96th. The most important reason people chose Xonotic is:
Open Source games are not always known for their high-quality graphics. This can often be caused by the games being designed by committee in that many different people may work on the graphics, even in the same areas, which can cause plenty of inconsistencies. Luckily, Xonotic does not suffer from this problem as the whole of the game has consistent looks that are actually quite impressive.
Specs
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Pros
Pro Minimal resource usage
AssaultCube is extremely fast, small, and network efficient for an FPS game.
Pro Cross platform support
AssaultCube runs on Windows, Mac, and Linux.
Pro Fast-paced multiplayer FPS gameplay
AssaultCube does a good job of adding fun, fast paced shooter gameplay (like in Counter Strike) to the open source world.
Pro Activity in multipayer
Many people online. You can play it every time you wish.
Pro In-game level editor with support for realtime multiplayer editing
Admins of a server can enter edit mode for a map during gameplay, updating components of the map live without needing to run other software or develop any code or image assets.
Pro Variety of fun game modes
Pro Has a decent number of community servers
Pro Impressive graphics, especially for an open source game
Open Source games are not always known for their high-quality graphics. This can often be caused by the games being designed by committee in that many different people may work on the graphics, even in the same areas, which can cause plenty of inconsistencies. Luckily, Xonotic does not suffer from this problem as the whole of the game has consistent looks that are actually quite impressive.
Pro Cross platform
Mac/Linux/Windows support.
Pro Many game modes
Includes all the expected options like Deathmatch and Capture the Flag, as well as more novel modes like Key Hunt.
Pro Fast-paced action
Pro Interesting weapon design (for an arena shooter)
All arena shooter basically use Quake or UT weapon system. However, Xonotic has an interesting variety of weapons (larger selection than most) with elements from both UT and Quake but added some of their innovative ideas. Some of the weapons have a bit of overlap and felt a bit forced, but other weapons really made the game stand out.
Pro Play easily online
At any time, you can find people playing on the net. No special configuration needed.
Pro Not demanding on the system
On integrated HD4600 graphics ~120 FPS on normal settings.
Pro Multiple floor levels gameplay
The game permits players to move across multiple floor levels, which permits more dynamic game play.
Cons
Con Few weapons
Few weapons. Really. One assault weapon, one pistol, one sniper rifle and one shotgun. Boring.
Con Lack of gameplay refinement
AssaultCube does not have that many weapons (though they do have some variety). Additionally, the game is not very balanced, as spawn points are sometimes in vision of other enemy spawn points.
Con Outdated graphics
Based off the original Cube engine, which has dated quite a bit.
Con Campaign can be very hard and you can get stuck
Some levels are very strange and difficult like fighting with almost invisible enemies.
Even at easy they are hard to beat and you must beat them in order to progress in campaign.
Con Few players
Very few players on the servers ate as it happens 5-9 people!
Con Boring AI bots
Bots are not the most performant opponents in Xonotic. They often run around the same paths, and sometimes even stand still on spots for apparently no reason.
Con No actual addons repository
Cannot download custom maps through the actual game. Instead you have to download maps online and then put them in a directory.