STE extension, Misty, The Missing Link, Control extension, Extra and Ninja Tracker. These extensions kept STOS alive for many years after its release. Criticisms While giving programmers the ability to rapidly create a game without knowing the internals, STOS was criticised for being slow (especially when intensively using the non-high-level commands), and for not allowing the user to program in a structured manner. Other platforms In 1990, AMOS BASIC was released for the Amiga. It was originally meant to shortly follow the release of STOS on the Atari ST. AMOS was released about two years after the UK release of STOS. But this turned out to be a blessing in disguise for the Amiga community thanks to the extra development time. Not only did AMOS take advantage of the extra Amiga hardware and have more commands than STOS, but the style of BASIC was completely different - it had no line-numbers, and there were many structured programming constructs (at one time, the STOS Club Newsletter published a program that allowed the reader to program STOS using that style). While it was often possible to directly convert STOS BASIC programs that did not heavily rely on extensions to AMOS BASIC, the reverse was not usually true. A PC version called PCOS was once mentioned, but that never materialised. Instead, the publishers Mandarin Software renamed themselves Europress Software. One of the developers in Jawx, Francois Lionet, was later to form Clickteam with Yves Lamoureux and went on to release the Klik (click) series of games-creation tools (which were dissimilar to STOS as they use a primarily mouse-driven interface without the need for traditional code). Klik & Play, The Games Factory, Multimedia Fusion and Multimedia Fusion 2 have been released in this series. References External links General History of STOS and AMOS STOS Time Tunnel - A site dedicated to STOS STOS - Basic Language for Making Games - Article about STOS and its extensions (with photos of the products and scans of old ads) Publishers Clickteam STOS and AMOS page - Source code for STOS and AMOS in 68000 ASM (archived ZIP, Compiler) Patches Generic STOS fixer - Use this to fix compiled STOS programs so that they run on a greater number of TOS versions. STOS Basic 2.07 - Use this to patch a version of STOS to version 2.07. It makes the compiled programs compatible with more TOS versions and