Abuse 2025

Abuse 2025

Celebrating its 30th anniversary, Abuse by Crack dot Com remains a timeless classic. Falsely imprisoned in an underground facility, Nick Vrenna becomes humanity's last hope when a genetic experiment called "Abuse" transforms guards and inmates alike into murderous mutants. As the only person immune to the infection, Nick must fight through hordes of grotesque creatures and security systems gone haywire to prevent the contaminated water supply from reaching the outside world. In this intense 90s action game, one man's quest for freedom becomes a desperate race to save humanity.

Experience revolutionary gameplay combining precision mouse aiming with fluid keyboard movement in this intense side-scrolling action platformer. Play through the whole campaign solo or in co-op, dive into community-created content, create your own challenging levels with the built-in editor, or challenge your friends in action-packed LAN multiplayer deathmatches. With its fast-paced combat and atmospheric pixel art, Abuse delivers non-stop action that holds up to this day.

Available as libre software, with source code released under open licenses and game assets as non-commercial freeware. The original shareware content is public domain, making Abuse one of pioneers in accessible, community-supported gaming.

Abuse 2025 is a modern port of the original game, updated to run on modern systems and with new features like high-resolution graphics, gamepad support, and more. This project is a continuation of the Xenoveritas SDL2 port and the Abuse 1996 project. It aims to be the go-to version for playing Abuse on modern systems.

Currently multiplayer between different platforms and on Windows is not supported.

Table of Contents

• Getting Started
• Configuration
• Playing the game
• Development
• Resources
• Acknowledgments

Getting Started

Installation

See the last release available for your platform in the release section. See the Development section for build instructions.

Data Files

While this repository contains all data files needed to play the base game, these assets come from different sources with varying licenses and historical records. My hope is that the educational and non-profit intentions of this repository will enable it to stay hosted and available. If you prefer to use only clearly-licensed content, please replace the included assets with the public domain subset of the original shareware content available from various archives online.

Save files and configuration are stored in the user folder, which can override default files in the game folder. The game only looks for built-in files if they weren't already found in a the user folder. This allows adding custom levels or mods without affecting the original bundled game files.

Default paths for user data:

• Windows: %APPDATA%\abuse\data
• macOS: ~/Library/Application Support/abuse/data
• Linux: ~/.local/share/abuse/data

For custom content, there are three types to consider:

Type	Installation	Launch
Custom Levels	Place level files in the data/levels folder	abuse -f levels/levelname.spe
Regular Mods	Place mod files in the data/addon folder	abuse -a modname
Total Conversion Mods	Place directly in the data folder	Launches automatically when starting the game

Basic Setup

1. Build and install the game following the platform-specific instructions
2. Configure display, audio, and controls settings in the config file (see Configuration)
3. Launch the game

For custom content:

• Place custom levels in the user data directory
• They will override any files with the same name in the base game directory

Configuration

Configuration is stored in config.txt in the user folder. It will be created if it doesn't exist at launch. Lines starting with ; are comments. Use 1 to enable and 0 to disable options.

Config File Options

Display Settings

• fullscreen - Fullscreen mode (0 - window, 1 - fullscreen window, 2 - fullscreen)
• borderless - Enable borderless window mode
• vsync - Enable vertical sync
• virtual_width - Internal game resolution width
• virtual_height - Internal game resolution height (calculated from aspect ratio if not specified)
• screen_width - Game window width
• screen_height - Game window height
• linear_filter - Use linear texture filter (nearest is default)
• hires - Enable high resolution menu and screens (2 for Bungie logo)
• big_font - Enable big font

The game is designed to be played at an internal resolution of 320×200 (virtual_width×virtual_height). Using a higher resolution may reveal some hidden areas. However, when using the editor, a higher resolution is recommended for better visibility and usability.

Audio Settings

• volume_sound - Sound effects volume (0-127)
• volume_music - Music volume (0-127)
• mono - Use mono audio only
• no_music - Disable music
• no_sound - Disable sound effects
• soundfont - Path to custom soundfont file. Custom or bundled AWE64 Gold Presets.sf2 or Roland SC-55 Presets.sf2

Game Settings

• local_save - Save config and files locally
• grab_input - Grab mouse to window
• editor - Enable editor mode
• physics_update - Physics update time in ms (65ms/15FPS original)
• mouse_scale - Mouse to game scaling (0 - match desktop, 1 - match game screen)
• bullet_time - Bullet time effect multiplier (percentage)
• language - Game language (english, german, french)

Key Bindings

Default control scheme:

Action	Default Binding
Left	← A
Right	→ D
Up/Jump	↑ W
Down/Use	↓ S
Prev Weapon	Q
Next Weapon	E
Fire	Mouse Left
Special	Mouse Right

Special key codes for config file:

• LEFT, RIGHT, UP, DOWN - Cursor keys and keypad
• CTRL_L, CTRL_R - Left and right Ctrl
• ALT_L, ALT_R - Left and right Alt
• SHIFT_L, SHIFT_R - Left and right Shift
• F1 - F10 - Function keys
• TAB, BACKSPACE, ENTER - Standard keys
• INSERT, DEL, PAGEUP, PAGEDOWN - Navigation keys
• CAPS, NUM_LOCK - Lock keys
• SPACE - Spacebar

Hardcoded Keys:

• 1-7 - Direct weapon selection
• Escape/Space/Enter - Reset level on death
• P - Pause game
• C - Cheat/chat console
• F1 - Show help/controls screen
• F5 - Quick save on save consoles (slot 1/"save0001.spe")
• F6 - Toggle window input grab
• F7 - Toggle mouse scale type
• F8 - Toggle gamepad use
• F9 - Quick load
• F10 - Toggle window/fullscreen mode
• Print Screen - Take a screenshot

Default Controller Bindings:

• D-pad, left stick - Move in all directions (game and menus)
• Home - Show help/controls screen
• Back - Acts as Escape key
• Start - Acts as Enter key

Gamepad Support

Gamepad options:

• ctr_aim - Enable right stick aiming
• ctr_cd - Crosshair distance from player
• ctr_rst_s - Right stick/aiming sensitivity
• ctr_rst_dz - Right stick/aiming dead zone
• ctr_lst_dzx - Left stick horizontal dead zone
• ctr_lst_dzy - Left stick vertical dead zone

Button binding names:

• ctr_a, ctr_b, ctr_x, ctr_y - Face buttons
• ctr_left_shoulder, ctr_right_shoulder - Shoulder buttons
• ctr_left_trigger, ctr_right_trigger - Triggers
• ctr_left_stick, ctr_right_stick - Stick clicks

Command Line Arguments

Core Settings

Argument	Description
-lsf <filename>	Custom startup file (default: abuse.lsp)
-a <name>	Load addon from addon/<name>/<name>.lsp
-f <filename>	Load specific level file
-nodelay	Disable frame delay/timing control

Network Settings

Argument	Description
-nonet	Disable networking
-port <number>	Set network port (1-32000)
-net <servername>	Connect to game server
-server <name>	Run as server
-min_players <number>	Set minimum players (1-8)
-ndb <number>	Network debug level (1-3)
-fs <address>	File server address
-remote_save	Store saves on server

Development/Debug

Argument	Description
-edit	Launch editor mode
-fwin	Open foreground editor
-bwin	Open background editor
-owin	Open objects window
-no_autolight	Disable auto lighting
-nolight	Disable all lighting
-bastard	Bypass filename security
-size	Custom window size (editor)
-lisp	Start LISP interpreter
-ec	Empty cache
-t <filename>	Insert tiles from file
-cprint	Enable console printing

Audio Settings

Argument	Description
-sfx_volume <number>	Sound effects volume (0-127)
-music_volume <number>	Music volume (0-127)

Playing the game

Game Menu

Use the mouse to select the various options.

Icon	Option	Description
	Load Game	This option is only available after you have saved your position during a game. To load a saved game, click on the Load Game icon. On the left of the Load Game screen are up to five save areas. Click on the number of the game/location you want to re-enter.
	Start New Game	Choose this option when you want to begin a single-player game from the start. You will still be able to access saved positions from previous games.
	Difficulty Levels	There are four levels of difficulty in Abuse: WIMP, EASY, NORMAL and EXTREME. The harder the level, the more difficult it is to kill your enemies, and the easier it is for them to kill you. Change the difficulty level by left-clicking on the difficulty box.
	Gamma Correction	Abuse is meant to be a dark game. To play the game as it is designed, select the darkest shade of gray that you can discern. It should be one step lighter than black. You may adjust the gamma correction any way you prefer. Save your gamma changes by clicking the red "check" button.
	Volume Control	You can adjust either the sound effects (SFX) or the music by pressing on the arrow buttons (remember that a General MIDI sound card is required to play music). Up arrows increase the volume; down arrows decrease it. Save your volume changes by clicking the button at the upper-left of the Volume Window or pressing Esc.
	Networking	This option takes you to the Network screen. This screen displays all available network games and allows you to create your own game. Join Existing Game: Select the game you would like to join, then fill out the info blocks. Press Esc to return to the Options Screen. Start a New Net Game: Click the START A NEW NET GAME button, then fill out the info blocks. Press Esc to return to the Options Screen. Exit Net Game: Exits you from your current game so you can join another one. If you're not currently in a game, this option will not appear.
	Quit Abuse	Exit the game and return to either your DOS prompt or Windows '95.

Controls

To better reflect modern game controls, the original arrow key controls have been replaced with WASD for movement. Mouse controls aim, left button shoots, right button activates special powers, and mouse scroll switches between weapons.​​​​​​​​​​​​​​​​

Falls. Jumping off a ledge is the fastest way down. Falls never do any damage at all.

Environment

Feature	Description
Health	These restore hit points.
Stations	Stations are places where you can save games. Stand in front of the station and press S.
	- To save your position, click on any of the numbered save buttons on the left. A small image of the current screen will appear in the save area.
	- To leave without saving your position, press Esc.
Switches & Doors	To activate a switch, press S. Sometimes, you'll need to use more than one switch to remove an obstacle.
Moving Platforms	Press S to activate a moving platform. If you use either A or D, you'll step off the platform.
Jump Enhancers	Jump toward a jump enhancer; when you hit it for the first time, your momentum temporarily increases. An enhancer needs to recharge briefly.
Destroyable Walls	Some walls will crumble and reveal secret rooms. Weak walls show cracks or signs of damage, but not always.
	- When hit, the weapon's fire will terminate with a red glow.
	- A solid wall hit terminates with a white glow.
Map View	Only available in network play. Press M to toggle the map view on and off.
Teleporter	There are two types of teleporters: local and level. Press S to use both.
Local teleporters	Send you to a different area of the same level.
Level exit teleporters	Send you to a new level.
Compass	Only available in network play. When acquired, the map view shows the locations of all the non-cloaked players.
Special Abilities	Once you run through an ability icon, hold down the right mouse button to use its special power.
	- You keep an ability through the rest of the level or until you acquire a new one.
Flash Speed	Increases your speed.
Cloak	Only available in network play. Makes you almost (but not quite) invisible to other players and shields you from appearing on large-scale maps.
Anti-Gravity Boots	Gives you the ability to fly.
Ultra-Health	Lets you accumulate up to 200 hit points, instead of the usual 100 points.

Weapons & Ammo

	Weapon	Ammo Type
	Laser	Regular Ammo
	Incendiary Grenade Launcher	Explosive Ammo
	Heat Seeking Rocket Launcher	Rockets
	Napalm	Fuel Ammo
	Energy Rifle	Energy Cells
	Nova Spheres	Spheres
	Death Saber	Energy Cores

Cheats

To use cheats, press c to open the console and type the desired cheat command. The mouse cursor must be inside the console window for input. Press enter when done, or type "quit"/"exit" to close the console.

Available cheats:

• god - Makes you invulnerable to all damage
• giveall - Gives all weapons and maximum ammunition
• flypower - Grants Anti-Gravity Boots effect
• sneakypower - Grants Cloak effect
• fastpower - Grants Flash Speed effect
• healthpower - Grants Ultra-Health effect
• nopower - Removes all active special abilities

Development

The game requires:

• SDL2 2.0.0 or above
• SDL2_mixer 2.0.0 or above
• CMake

Building on macOS

brew install cmake sdl2 sdl2_mixer

You also need Xcode Command Line Tools:

xcode-select --install

mkdir build && cd build
cmake .. -DCMAKE_INSTALL_PREFIX=.
make
make install

Building on Ubuntu

sudo apt-get install build-essential cmake libsdl2-dev libsdl2-mixer-dev

mkdir build && cd build
cmake ..
make
make install

For local installation use

mkdir build && cd build
cmake .. -DCMAKE_INSTALL_PREFIX=.
make
make install

Resources

Game Info