Player-made content Edit
Creativerse already enables and includes user content like player-made shareable Blueprints (for buildings, Arc sign art, machines and the like) in the workshop http://steamcommunity.com/workshop/browse/?appid=280790&actualsort=toprated&browsesort=toprated&p=1.
There's also the special game mode "Adventures".
Adventures are instances of player worlds where not only sightseeing tours for buildings can be made for others to enjoy, but all kinds of player-created quests, jumping/flying parcours, puzzles of all sorts with spawnable mobs, treasures, checkpoints to search for, rollercoasters, labyrinths, disappearing/appearing walls (or floor parts, stairs or platforms), timed devices like lights, doors to be locked with number puzzles, switch-puzzles, quest-like stories to be told and much more like that.
The game also offers several customization options, from the look of player characters to nearly all key settings.
Actual modding Edit
Making Creativerse actually "moddable" is being considered by Playful too - however at a future date. But this "moddability" will not simply consist of allowing everyone to freely reverse engineer the game code.
This is what the official FAQs stated for years until the launch of the game (May 2017):And this is what members of Playful have stated about this topic on the forums:
Unresolved problems with making Creativerse moddable Edit
In 2016 community managers stated that Playful still tries to figure out how to avoid typical problems that player-made mods often produce for a game before the developers will be able to create a safe modding API.
Playful has stated that their developers will not be able to offer support for player-made mods. If we take a look at player-made Blueprints, it is quite possible that hundreds of mods will quickly be created, since within just one month after the workshop was opened, over 5000 Blueprints had already been added by Creativerse players, half of them with a questionable "quality" (like captured parts of game worlds, resource blocks put together so they can be bought for Coins as building kits, or variations of Blueprints originally published by Playful).
Playful as a small company cannot take their time to search for possible copyright-issues (mainly when modders use copyright-reserved names or copyrighted content like 3D models, textures, images, music, sounds etc. from other games or media), or add legally forbidden content to their mods that could damage the reputation both of Creativerse and Playful themselves. This would be especially risky if player mods were purchasable with money that would be paid to their creators who could be located in any country on Earth.
A way has to be found to coordinate player mods with the official ongoing game development, since Creativerse is still updated ca. every month and sometimes with very large new features. During the upcoming years the basic game code might be upgraded thoroughly, which could render many player mods unplayable in an instant.
It's well known that game-breaking bugs can easily originate from player mods when they aren't updated by their creators anymore. And most modders stop caring for mods that they have created after a few years as can be seen when taking a look at the modding scene of any other popular long-running game.
Playful has plans to implement a long list of new features to Creativerse, some of which are already under way. It's quite possible that amateurish player mods would offer such features (knowing the forums, we can assume that every Minecraft feature would be copied by player mods for Creativerse) in ways that the official professional development wants to go about in their own unique way that could then interfere with player mods.
The game balance of Creativerse is another topic to consider, since the developers have built the game around certain principles. The pivotal gaming progress is based on mining tiers and on crafting one tier of equipment after the other. Overpowered weapon and armor that can be crafted or found right from the start is a very typical modding content for games that would not only make game challenges like boss mobs and seasonal events laughable, but would even make the basic player advancement in Creativerse seem useless from this point on.
Game content like machines, blueprints and crafting recipes have their own balance in Creativerse for a reason. If player mods offered tons of crappy looking blocks and objects that can be produced without requiring any resources, who would still craft the well-designed "officially" developed items after collecting hundreds of resource materials?
If player mods would create cornerstone variants that will build a Blueprint instantly without even requiring to collect resources, who would use Playful's own cornerstone game mechanics like the burst fill any longer? If player mods copied simple Minecrafty game-mechanics for redstone-like controls, who would still bother with the more complicated operating gates from Playful?
It is likely that more and more complaining players would rather demand of Playful to adjust their game to the most popular mods, like perhaps to trash the whole crafting menu or changing Creativerse into Minecraft II.
Last but not least Playful has to find a way to ensure that player-made content, even simple skins like block textures, but also glider, flashlight, world options, combat difficulties etc. will not recreate, obviate or preempt the purchasable game content offered by Playful via Store and DLCs that is necessary to finance the game development. Otherwise Playful could go out of business very quickly and would have to close their servers.
Altering Creativerse game data/files is already possible, but can get you sued Edit
Nowadays many people know how to extract graphic files or take a look into Unity files of a game program.
However you are not allowed to use this in any way to alter the game or make the data known on any public platform. If you want to do so, you have to ask Playful as the copyright-holders for their permission beforehand.
If you have not downloaded Creativerse yet, then please note that you will have to accept the EULA at the time you install Creativerse. This is standard for nearly every multiplayer online game, and you will not be allowed to play this game if you do not agree to respect the copyrights of Creativerse's developers.
If you are not willing to abide by the EULA (which includes the usual netiquette towards your fellow players, but also forbids using the game to earn money for yourself and to modify game files) then you should not even bother clicking on "I agree/accept". If you do not agree to the EULA, you are not permitted to install the game on your computer nor to play Creativerse on any computer at all.
If you already play Creativerse, then you must have accepted the EULA Edit
By clicking on the "I agree" (or "I accept") button when installing the game or starting to play the game via Steam for the first time you have promised to abide by the terms and conditions, even if you perhaps have just "clicked them away" and have not bothered actually reading them.
Still the EULA is a legally binding contract.
In regard of any modifications that you plan to make for/to the game or that other players have created unauthorized, you should call your attention to this part of the EULA for Creativerse:
"Except for the initial loading of the Game Software on a single unit you shall not, without our express written consent:
(a) Copy or reproduce, auction, loan, rent, lease, sublicense, gift or transfer the Game Software;
(b) Modify, adapt, translate, reverse engineer, derive source code from, disassemble, decompile or create derivative works based on the Game Software or any accompanying materials, except to the extent allowed under any applicable law or expressly allowed by us.
Any use of the Game Software in violation of these limitations will be regarded as an infringement of our copyrights in and to the Game Software.
Obviously, we cannot have you hacking our software. Therefore, by accepting the terms of this EULA, you further agree that you will not, under any circumstances:
(a) Modify the Game Software in any way, including but not limited to the use, development, or sale of cheats, automation software (bots), hacks, mods, whether developed by you or a third party;
(b) Exploit the Game Software for any commercial purpose, including without limitation (1) use at a cyber café, computer gaming center or any other location-based site; (2) for gathering in-game currency, items or resources for sale outside the Game Software; or (3) for performing in-game services in exchange for payment outside the Game Software;
(c) Remove, disable, modify, deface, or circumvent any security protections, proprietary notices or labels contained on or within the Game Software;
(d) Export or re-export the Game Software or any copy or adaptation in violation of any applicable laws or regulations;
(e) Create data or executable programs that mimic data or functionality in the Game Software;
(f) Use any unlawful, obscene, pornographic, provocative, racist, libelous, abusive, harassing, tortious, defamatory, vulgar, or hateful language or language invasive of another's privacy on the forums and chats relating to the Game Software;
(g) Submit any content containing unsolicited or unauthorized advertising, chain letters, pyramid schemes, or any other form of solicitation or to submit any content containing software viruses or malware of any kind; or
(h) Solicit or attempt to solicit other Game Software user’s personal information or collect or post their private information.
Any use of the Game Software in violation of these limitations will be regarded as an infringement to this EULA and will be pursued to the fullest extent permissible under the law."