A new beta version of OpenTTD 1.20 has been released. OpenTTD is a clone of the Microprose game "Transport Tycoon Deluxe", a popular game originally written by Chris Sawyer. It attempts to mimic the original game as closely as possible while extending it with new features.
Quote: 1.2.0-beta3 (2012-01-21)
Feature: [NoGo] Allow to chose the goal question window´s title from a (small) set of options [FS#4992] (r23827)
Feature: [NewGRF] Enhance some fatal NewGRF errors with the spritenumber that caused the problem (r23809)
Fix: Return early from SlString() for empty strings, before doing invalid things which surprisingly do not break everything. (r23828)
Fix: The detailed performance rating window showed the cargo count of the current quarter instead of the last quarter like the tooltip says [FS#4972] (r23826)
Fix: Removal of towns with 0 population failed during map generation [FS#4951] (r23819)
Fix: [Network] Desync due to different NewGRF version at client and server [FS#4962] (r23817)
Fix: [NewGRF] Textstack was not properly used when storing parameters for the error message window [FS#4969] (r23803)
Fix: Game lobby gui not updated when new company information becomes available [FS#4968] (r23802)
Fix: Reading the UTF-8 BOM from AI/GS files on big-endian machines failed (r23801)
Fix: Move ´refitable to´ text above custom newgrf text in build vehicle gui [FS#4958] (r23792)
Fix: [NewGRF] Resize text panel for parameter description if it does not fit in 4 lines [FS#4960] (r23791)
Fix: [NewGRF] While we can only show one error per NewGRF, fatal errors should always disable the GRF. Also give those errors precedence over other information (r23789)
Fix: [NewGRF] Failure to load newgrf files that use action 0 general prop 15 with a missing language file (r23788)
Fix: Crash due to genders used for station name in hangar string of Italian translation [FS#4965] (r23782)
Fix: Under certain circumstances, e.g. a single invalid order, trying to determine the next order state could end up in an infinite loop [FS#4964] (r23781)
Fix: [Network] Missing naming of some errors[FS#4963] (r23780)
Fix: Trim all control codes and the likes from strings being passed into the AI. If the AI would be displaying them later we would be showing those control codes as question marks [FS#4957] (r23778)
Fix: Hide the PCX screenshot format from the options window, if a 32bpp blitter is used (r23775)
Fix: [NewGRF] Update all cached train properties if a train vehicle enters a new railtype (r23773)