CommonLisp

Common Lisp has a great community and great library support for things like SDL, OpenGL, and TrueType fonts. So it makes a good option for Lisp game development. It may be more difficult to learn than Scheme though luckily there are excellent free tutorials and resources available.

Getting Started
So what is Common Lisp? Heres the wikipedia definition but if this is your first dip into lisp and you want to get stuck in you may want to look into the charming Casting SPELs in Lisp.

The thing that really scares off some new people when they come to Common Lisp is that they went on a mental journey something along the lines of:

"What is this Lisp thing then?"

 

"Hmm there seem to be lots of them...Ah well Common Lisp doesnt sound too threatening"

 

"HOLD ON THERE DIFFERENT TYPES OF COMMON LISP?"

Yeah, Common Lisp is a standard (like Ada and C) so there can be many implementations. The easiest way to pick one is to have a good google, see what resources you find that 'speak your language' and go with that version. What? You want to be told which version? Well SBCL is fast, close the the standard and easy to get installed. Honestly there will be many that have excelent and precise reasons for their choice of implementation, don't let it bog you down!

Here are some more links to resource to help you with Common lisp

Learning Common Lisp

Graphics
Games come in many shapes, genres & sizes but almost all are visual to some degree. Common Lisp has a nice selection of libraries to help you wrangle with file formats, manage your game window and render all that 2D or 3D goodness to the screen.

APIs

 * Cl-opengl If your writing games in common lisp you are almost certainly going to be using OpenGl. This wrapper enables common lisp to access almost every feature of opengl.
 * LDX is an attempt to bring DirectX into Common Lisp. (It does not look complete or activly maintained)
 * Lispbuilder-SDL provides a set of bindings and Lispy abstractions for graphics, sound, input and other features
 * PAL (Pixel Art Library) is a portable Common Lisp graphics and sound library for 2d games
 * glop provides simple OpenGL window and context manipulation code as well as system input handling
 * cl-glfw is an open source, multi-platform library for opening a window, creating an OpenGL context and managing input.

File Handling

 * cl-devil provides bindings to the DevIL image loading and manipulation library
 * imago is an image manipulation library for Common Lisp
 * cl-cairo2 is a graphics library that provides Common Lisp bindings for the Cairo API.
 * CLX provides an implementation of the X Window System protocol to Lisp graphics library[ies] and applications.
 * cl-soil is a work-in-progress wrapper around the SOIL library

Graphics Engines

 * CLinch is a shader based graphics engine using CL-OpenGL. It has strong vector graphics support. It now has tutorials.
 * CL-Horde3d is a wrapper around the open source graphics Horde3d
 * okra is a wrapper around the open source graphics engine OGRE

Input Handling
Some of these are a repeat from the graphics sections as libraries like sdl have many features
 * Lispbuilder-SDL provides a set of bindings and Lispy abstractions for graphics, sound, input and other features
 * glop provides simple OpenGL window and context manipulation code as well as system input handling
 * cl-glfw is an open source, multi-platform library for opening a window, creating an OpenGL context and managing input.

Audio

 * Lispbuilder-SDL
 * cl-openal
 * cfxr

Physics

 * SquirL (2d)
 * buclet (3d)
 * cl-ode

Game Engines Written in Lisp

 * Blocky
 * blackthorn
 * lisp-game-engine
 * CL-TCOD
 * Until It Dies
 * glaw
 * PLTCOD