diff --git a/README.md b/README.md
index 1520b60..c99d295 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,18 @@ Requirements:
 - SDL 2.x
 - CMake 3.1 or higher
 
+Available backends are:
+- `BUILD_OPENGL_LEGACY` OpenGL Compatibility profile 1.1 (default ON)
+- `BUILD_OPENGL` OpenGL Core profile 3.3 (WIP)
+- `BUILD_METAL` Fruit renderer (WIP, ON by default for APPLE)
+
+OpenGL Core profile backend requires:
+- Python 3
+
+Metal backend requires:
+- Fruit device
+- Python 3
+
 For *nix:
 ```shell
 cmake -B build -DCMAKE_BUILD_TYPE=RelWithDebInfo