0	f	f	f	f	f	f	f	f	DRM-free	This release is available without DRM.
1	f	f	t	f	t	f	f	f	Steam DRM/CEG	Used by many Steam titles. Requires the Steam client to be installed and running in order to launch the game. This system may include CEG (Custom Executable Generation), a protection method where executables are uniquely generated per user to prevent unauthorized sharing.\nIf the title can't detect that the launcher is running, it won't start, opening Steam instead. In some cases, it can boot the player out of the game or, in extreme cases, stop responding at all.
2	f	f	t	t	t	f	f	f	Denuvo Anti-Tamper	Limited to five daily activations per game, which resets 24 hours after the first activation. Stores licensing data (the "offline token" used to launch the game) separately on the storage drive. However, it requires an online connection periodically to renew this token.\n\n[More information on [url=https://www.pcgamingwiki.com/wiki/Denuvo#Denuvo_Anti-Tamper]PCGamingWiki[/url]]
3	f	t	t	t	t	f	f	f	Soft-Denchi	A separate runtime usually shipped with digital releases of games from marketplaces like DMM or DLsite. Requires a Soft-Denchi account to activate the same product on multiple systems. [url=http://www.paltio.co.jp/soft-denchi/]Official website[/url].
4	f	t	t	t	t	f	f	f	PlayDRM	Used by DLsite. It can have a limit of 3 or 5 activations per game, depending on the title. An internet connection is required for installation and authentication.
5	f	t	t	t	f	f	f	f	Software Defender	5 time activation limit. Additional restrictions may apply depending on the configuration set by the developer.
6	f	t	t	t	f	f	f	f	Virtual Mate (V-Mate)	Provided by Interlex, Inc, this DRM was retired in 2010, and all games that previously used the system are now DRM free. Before that, it was limited to three activations and required an online authentication every time at launch.\n\nUsers who own the older physical versions of these games can download a patch to remove the DRM:\n* Uninstall V-Mate from your machine.\n* Download your game's patch at https://help.jastusa.com/en/knowledgebase/article/drm-removal-patches\n* Manually replace your game's file with the patched file.
8	t	f	f	f	f	f	f	f	Alpha-ROM	Disk encryption scheme by SETTEC, common in many 2000-era physical games.\nIf the Disc Check failed to work properly, the serial number that came with the game can be input into the [url=http://settec.jp/patch/search.asp]SETTEC website[/url] to get a file which is placed in the directory of the EXE.
9	f	f	f	f	f	t	f	f	Always online (generic)	Games that requires a constant internet connection. Any loss of connection will boot the player out of the game.\nCommon in many online games, like gacha games or social games.
10	t	f	f	f	f	f	f	f	Disc check (generic)	Basic disc check system, but the specific DRM implementation is unknown or undocumented.
11	f	t	f	f	f	f	f	f	CD-key (generic)	These games ask for a serial or product key during installation.
12	f	f	t	f	f	f	f	f	Online activation (generic)	Requires an internet connection each time the game is installed.
13	f	t	t	f	t	f	f	f	Buddy	Requires a Buddy account and the Buddy Launcher for activation, which are later used each time a game is launched. Needs an internet connection at launch. [url=https://www.drmbuddy.com/]Official website[/url].
16	t	t	f	f	f	f	f	f	StarForce	Russian DRM system used during the early to mid-2000s. Initially relied on physical disc checks, later versions used activation codes, and eventually online activation (StarForce ProActive). It is the successor to Ring Protect.\n\nStarForce installs kernel-level drivers on the background, which makes it difficult to remove and caused compatibility issues with virtual drives. The protection was known to interfere with system stability and hardware, and it remained active even after uninstalling the game unless manually removed. Official removal tools were later released.\n\n[More information on [url=https://www.pcgamingwiki.com/w/index.php?title=StarForce]PCGamingWiki[/url]]
17	f	t	t	f	t	t	f	f	DMM Game Player	Official client used to run games purchased through DMM. Frequently verifies game files and the system's region/language configuration. Most titles require an internet connection at every launch and won’t run if the client is closed, forcibly terminating the game. Installed games may be encrypted or region-locked.
18	t	f	f	f	f	f	f	f	SafeDisc	SafeDisc is a copy protection program for Microsoft Windows applications and games distributed on optical disc. Created by Macrovision Corporation, it was aimed to hinder unauthorized disc duplication. It was introduced in 1998 and discontinued on March 31, 2009.\n\nNot supported since Windows 10, nor previous versions of Windows with the KB3086255 update installed due to security concerns. Restoral is possible using a non-intrusive [url=https://github.com/RibShark/SafeDiscShim]SafeDiscShim[/url] compatibility tool.
19	f	f	t	t	t	f	f	f	Johren Activation Code	
20	f	f	f	f	f	f	f	t	Physical check (generic)	Physical DRM methods such as manual lookups or codewheels. Common in old physical-only releases.
21	t	f	f	f	f	f	f	f	Ring Protect	A common CD/DVD check used by many older PC titles. Unlike its modern variant, it does not require a CD-key.\nRing Protect was later upgraded and renamed to ProRing, and eventually became StarForce from version 4 onwards, with a more aggressive activation system.
22	f	f	t	f	t	f	f	f	DLsite ADV	Used by DLsite for Android games. Requires DLsite's own Android application for installation.
24	f	f	f	f	f	f	f	f	Enigma Protector	Protects the executable file by running a protection code in a virtual CPU, usually to avoid cracking and modding. This might require higher system requirements than usual for the end user.\nIt can also store and process purchase orders, generate registration keys and store customer information in a database.\nCreated by a company with an unknown HQ location with physical addresses in at least 3 different countries, but it's highly likely it's from Russia.\n\n[From the [url=https://enigmaprotector.com/]official website[/url] and [url=https://steamcommunity.com/app/222480/discussions/0/4141689926403638284/]Steam forums[/url]]
26	t	t	f	f	f	f	f	f	APS Safecheck \\ Authentication System	Obscure DRM system apparently developed by a company called "APS". Only the DRM name is known, split into 2 executables: "Safecheck.exe" and "Authentication System.exe".\nIt is unknown how it is officially named, or if it has an official name at all.\nTechnical information about its functionality is currently unavailable, but it is speculated that it might check for an activation code and the disc.\n\nBased on the existing files. No documentation, registered trademarks, reports or technical support has been found.
27	t	f	f	f	f	f	f	f	ProRing	Successor to Ring Protect, used mostly in Japan until StarForce became standard.\nIn addition to checking for the original disc, it verifies checksum files and blocks execution through virtual drives or mounted ISOs.
29	t	f	t	t	f	f	f	f	SecuROM	CD/DVD copy protection system developed by Sony DADC and used in many older commercial PC games. In most cases, it also includes online activation and activation limits.\n\nWhen activation limits are enforced, SecuROM installs a program on the computer that collects hardware information and uploads it to a remote server for verification. Hardware changes or new Windows installations may be interpreted as a different computer, forcing another activation. In some cases, users had to contact the publisher to raise the activation limit if the revoke tool (SecuROM 7.x and later) was not included. If the company discontinues support for SecuROM, the game may become unplayable unless a patch or update is released.\n\n[Based on [url=https://en.wikipedia.org/wiki/SecuROM]Wikipedia[/url]]
30	f	t	t	t	f	f	f	f	Serial Number Issuing	Used by DLsite. It can have a limit of 3 or 5 activations per game, depending on the title. Very similar to PlayDRM, with the difference of not being tied to an account.
31	t	t	f	f	f	f	f	f	Slovak Protector (SVKP)	Packer/runtime obfuscator
