diff --git a/Cargo.lock b/Cargo.lock
index d05ac51..1b35884 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -172,7 +172,7 @@ checksum = "dcc811dc4066ac62f84f11307873c4850cb653bfa9b1719cee2bd2204a4bc5dd"
 
 [[package]]
 name = "upkr"
-version = "0.2.0-pre3"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "cdivsufsort",
diff --git a/Cargo.toml b/Cargo.toml
index 02a9b53..cea6a5c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "upkr"
-version = "0.2.0-pre3"
+version = "0.2.0"
 edition = "2021"
 
 [profile.release]
diff --git a/README.md b/README.md
index b372148..36f4add 100644
--- a/README.md
+++ b/README.md
@@ -2,13 +2,57 @@
 
 Upkr is a simple general purpose lz packer designed to be used in the [MicroW8](https://github.com/exoticorn/microw8) platform.
 The compressed format is losely based on [Shrinkler](https://github.com/askeksa/Shrinkler) with the main difference being that
-Upkr doesn't differnetiate between literals at odd or even addresses and that I went with rANS/rABS instead of a range coder.
+Upkr doesn't differentiate between literals at odd or even addresses (by default) and that I went with rANS/rABS instead of a range coder.
 
-At this point, Upkr should still be considered unstable - the compressed format is not very likely to change but I still want
-to keep that option open a little longer.
+Compression rate is on par with Shrinkler.
+
+The differences compare to Shrinkler also makes it interesting on 8bit platforms. The z80 unpacker included in the release
+is both about twice as fast and smaller than the Shrinkler unpacker.
 
 ## Inspirations:
 
 * Ferris' blog about his [C64 intro packer](https://yupferris.github.io/blog/2020/08/31/c64-4k-intro-packer-deep-dive.html)
 * [Shrinkler](https://github.com/askeksa/Shrinkler)
-* Ryg's [sample rANS implementation](https://github.com/rygorous/ryg_rans)
\ No newline at end of file
+* Ryg's [sample rANS implementation](https://github.com/rygorous/ryg_rans)
+
+## Unpackers
+
+The release includes a reference c unpacker, as well as some optimized asm unpackers (arm and riscv). The unpckers in
+c_unpacker and asm_unpackers unpack the default upkr compressed format. The z80_unpacker
+is based on some variations to the compressed format. (Use `upkr --z80` to select those variations.)
+An optimized x86 (DOS) unpacker is currently being worked on out of tree.
+
+## Usage
+
+```
+  upkr [-l level(0-9)] [config options] <infile> [<outfile>]
+  upkr -u [config options] <infile> [<outfile>]
+  upkr --margin [config options] <infile>
+
+ -l, --level N       compression level 0-9
+ -0, ..., -9         short form for setting compression level
+ -u, --unpack        unpack infile
+ --margin            calculate margin for overlapped unpacking of a packed file
+
+Config presets for specific unpackers:
+ --z80               --big-endian-bitstream --invert-bit-encoding --simplified-prob-update -9
+ --x86               --bitstream --invert-is-match-bit --invert-continue-value-bit --invert-new-offset-bit
+ --x86b              --bitstream --invert-continue-value-bit --no-repeated-offsets -9
+
+Config options (need to match when packing/unpacking):
+ -b, --bitstream     bitstream mode
+ -p, --parity N      use N (2/4) parity contexts
+ -r, --reverse       reverse input & output
+
+Config options to tailor output to specific optimized unpackers:
+ --invert-is-match-bit
+ --invert-new-offset-bit
+ --invert-continue-value-bit
+ --invert-bit-encoding
+ --simplified-prob-update
+ --big-endian-bitstream   (implies --bitstream)
+ --no-repeated-offsets
+ --eof-in-length
+ --max-offset N
+ --max-length N
+```
diff --git a/release/.gitignore b/release/.gitignore
new file mode 100644
index 0000000..54124cb
--- /dev/null
+++ b/release/.gitignore
@@ -0,0 +1,4 @@
+*.zip
+*.tgz
+upkr-linux/
+upkr-windows/
diff --git a/release/Makefile b/release/Makefile
new file mode 100644
index 0000000..b786704
--- /dev/null
+++ b/release/Makefile
@@ -0,0 +1,35 @@
+VERSION=0.2.0
+
+all: clean upkr-linux-$(VERSION).tgz upkr-windows-$(VERSION).zip
+
+clean:
+	rm -rf upkr-linux
+	rm -f upkr-linux*.tgz
+	rm -rf upkr-windows
+	rm -f upkr-windows*.zip
+
+upkr-linux-$(VERSION).tgz: upkr-linux/upkr PHONY
+	cp ../README.md upkr-linux
+	cd .. && git archive HEAD c_unpacker | tar -xC release/upkr-linux
+	cd .. && git archive HEAD z80_unpacker | tar -xC release/upkr-linux
+	cd .. && git archive HEAD asm_unpackers | tar -xC release/upkr-linux
+	tar czf $@ upkr-linux
+
+upkr-windows-$(VERSION).zip: upkr-windows/upkr.exe PHONY
+	cp ../README.md upkr-windows/
+	cd .. && git archive HEAD c_unpacker | tar -xC release/upkr-windows
+	cd .. && git archive HEAD z80_unpacker | tar -xC release/upkr-windows
+	cd .. && git archive HEAD asm_unpackers | tar -xC release/upkr-windows
+	zip -r -9 $@ upkr-windows
+
+upkr-linux/upkr:
+	cargo build --target x86_64-unknown-linux-musl --release
+	mkdir -p upkr-linux
+	cp ../target/x86_64-unknown-linux-musl/release/upkr upkr-linux/
+
+upkr-windows/upkr.exe:
+	cargo build --target x86_64-pc-windows-gnu --release
+	mkdir -p upkr-windows
+	cp ../target/x86_64-pc-windows-gnu/release/upkr.exe upkr-windows/
+	
+PHONY:
\ No newline at end of file