Making a Mod - Best Practices

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This article is designed to help anyone who considers making mods for any of the games made by Frictional Games.

Starting Out

Working on a mod alone is entirely possible especially if the mod is very small, but it is recommended to assemble a team if it's possible. Whether you need help with level design, programming or something else, it is a good thing to work together instead of having one person team. That comes with the responsibility of managing a team and making sure the work is actually done.

The guiding rule here is to keep it small. Adding more people to the team does not mean more work will get done. The more people you have, the more time spent managing them.

When looking for team members, try to only hire people you absolutely cannot survive without. Your first instinct might be to hire anyone who can code, or model, or make maps, and so on. But for your first version, you probably won't need more than one person for each area of your mod (code, sound, models, maps). You may not even need any new models, sounds, or maps. Do not hire anyone until you've seen examples of their work. Make sure they've actually finished things. If they're a modeler who's done 20 models, but they're all half-finished, you don't want them.

It is also possible to form a team in order to learn together about making mods in general, so everyone in the team can teach each other.

Mod Design

One of the most useful questions you can ask yourself is "Why should someone play my mod?" It's a hard question to answer truthfully, but if you can answer it well, you're on the right track. Think about what other mods are out there, and what they offer. Does your mod offer something new to the players? Is what you offer enough to entice players who are busy playing other mods? Even if you cannot answer this question, just thinking about it will probably help your mod.

Realistic Goals

Create realistic goals for yourself. Think about how long it takes a commercial developer to make a horror game with 20 maps. If your mod is going to have 30 maps, the development process is going to be very hard. The thing to keep in mind here is "Quality over Quantity." Players would far prefer to have a short, unique and well balanced mod than big, repeating

Do not be afraid to cut content and features. If the mod looks like it's never going to be finished, or there's some content that you don't think meets the quality of the rest of the mod, then start cutting.

Learn to Take Criticism

One crucial thing to learn is to know how to receive criticism about your work. When sharing your work online and with your team, criticism will be inevitable. If someone did not like what you made or suggested a better way to achieve something, there is no reason for you to attack them. Attacking someone just because they did not like your work, or because they suggested something else, is a destructive and toxic behavior, especially if you can't take suggestions from your own team members. Take constructive criticism to heart, and ignore the destructive ones. Taking suggestions from other people doesn't make you less of a person, quite the opposite.

Compete With Gameplay and Story

Do not just focus on classic horror, be creative and make mods with interesting story and gameplay. It doesn't even have to be horror to begin with. The issue with horror games is that it's very hard to make something unique and interesting for players to engage. Horror cannot be repeated, which is why it is recommended to break boundaries. You don't have to worry about the commercial viability of new gameplay styles or bizarre stories, you can try out truly new ideas. Most mods cannot compete on a content level (maps, models, sounds, etc) with commercial products. They've got teams of artists with years of experience. Beat them with your gameplay and creativity. Players will play a mod that has very little in the way of new content, but has interesting story and some new gameplay thrown into the mix.

Understand the Engine

You really should read the documentation of the game you want to mod. The thing you'll learn most by doing so isn't whether you can do X with the engine, but rather how X should be done so it works well. There will be multiple ways to achieve what you want to create, but only one way would be the best and correct way to do it, without affecting too much on performance, code problems, and other risky stuff. If you learn how to code properly, then you can avoid bugs later in the development of your mod. If you learn how to create materials properly, you will have an easier time altering and adding new materials in the future.

Working on the Mod

When working on the actual mod, it is important to be able to keep track of your and other's work, while making sure everyone knows what left to be done, what is already done and more. The following section provides links to useful tools and guides which will help you to achieve that.

Setting up a Scrum Board

In short, a scrum board is a board used for keeping track the team's development progress. It is very useful for assigning tasks, tracking what was done and what needs to be done, tracking bugs and backlog features. One of the free tools which provide that is Trello and is recommended when working on mods.

Setting up an Online Repository

You can read about Setting up an Online Repository here.


Before the mod can be released, it should pass a series of procedures which will make sure the mod is clean of bugs and stable enough so it can be played by the public.


From now on, you should be running Playtests on the mod whenever possible. Playtests should be performed on the versions of the game in which you want to release. Don't let team members play from their personal versions of the mod, many hours can be wasted on finding bugs caused by incompatible versions.

Bugs and Changes

A complete list of all bugs and changes should be maintained, and their current status. Preferably this should be done in services like Trello. Notifying bugs on platforms like Discord is totally insufficient for tracking bugs; it's just too easy for the messages to stack up and get lost. After each playtest, the bugs and necessary changes from the log file should be added, and assigned to team members. When a team member has fixed a bug or change, they should submit the new content to the mod creator, who should verify that it is fixed and then update the status on the bug list.

Cut or Defer Broken Features

The hardest and unfortunately most necessary part of shipping is the act of being realistic and cutting features. Your mod simply cannot have every cool feature and still ship in a reasonable time frame. The creator of the mod should make decisions about what to finish and what to cut, based on how far along in the release process they are.


So you have released your mod, and soon enough rating and reviews started popping up. Your mod may or may not have been successful, but what comes next is up to you. The best approach is to learn from the feedback you get, see what worked and what didn't, and improve it for the next time. Talk with players, get involved in how they experienced your mod.

Making horror games is hard, and poses challenges not seen in other genres. It can take time to brew a good idea for a mod, so make sure you let it cook for enough time!

Knowing what to fix, what to change, and how to listen to your community is a continual learning process.

Good luck!

See also