OpenTTD v1.1.0 RC 1 is released. OpenTTD is an open source simulation game based upon the popular Microprose game "Transport Tycoon Deluxe", written by Chris Sawyer. It attempts to mimic the original game as closely as possible while extending it with new features.

Features
OpenTTD is modelled after the original Transport Tycoon game by Chris Sawyer and enhances the game experience dramatically. Many features were inspired by TTDPatch while others are original.

Significant enhancements from the original game include:

bigger maps (up to 64 times in size)
stable multiplayer mode for up to 255 players in 15 companies, or as spectators
dedicated server mode and an in-game console for administration
IPv6 and IPv4 support for all communication of the client and server
in game downloading of AIs, NewGRFs, scenarios and heightmaps
new pathfinding algorithms that makes vehicles go where you want them to
autorail/-road build tool, improved terraforming
canals, shiplifts, aqueducts
larger, non-uniform stations and the ability to join them together
mammoth and multi-headed trains
different configurable models for acceleration of vehicles
clone, autoreplace and autoupdate vehicles
the possibility to build on slopes and coasts
advanced/conditional orders, share and copy orders
longer and higher bridges including several new designs, plus fully flexible tracks/roads under bridges
reworked airport system with many more airports/heliports (e.g. international and metropolitan)
presignals, semaphores, path based signalling
support for TTDPatch NewGRF features offering many options for graphics and behaviour configuration/modification
drive-through road stops for articulated road vehicles and trams
multiple trees on one tile
bribe the town authority
many configuration settings to tune the game to your liking
save games using zlib compression for smaller sizes, while not interrupting gameplay
significant internationalisation support. OpenTTD has already been translated into over 50 languages
dynamically created town names in 18 languages, plus NewGRF support for additional languages
freely distributable graphics, sounds and music
framework for custom (user) written AIs
zooming further out in the normal view and zooming out in the small map
Lots of effort has been put into making OpenTTD easy to use. These include:

convert rail tool (to electrified rail, monorail, and maglev)
drag&drop support for almost all tools (demolition, road/rail building/removing, stations, scenario editor, etc)
sorting of most lists based on various criteria (vehicle, station, town, industries, etc.)
mouse wheel support (scroll menus, zoom in/out)
autoscroll when the mouse is near the edge of the screen/window
sell whole train by dragging it to the dynamite trashcan
cost estimation with the 'shift' key
advanced options configuration window, change settings from within the game
Graphical/interface features:

screenshots can be in BMP, PNG or PCX format (select in game options menu)
more currencies (including Euro introduction in 2002)
extra viewports to view more parts of the game world at the same time
resolution and refresh rate selection for fullscreen mode
colourful newspaper after a certain date
colour coded vehicle profits
game speed increase (through fast forward button or by pressing the TAB key)
snappy and sticky windows that always stay on top and neatly align themselves to other windows
more hotkeys for even less mouse-clicking
support for 32 bit graphics
support for right-to-left languages
support for other (sized) fonts where the user interface scales based on the font and translation

OpenTTD v1.1.0 RC 1 Changelog:
- Feature: [NewGRF] Test all possible industry layouts during construction and prospecting [FS#4131] (r22012, r22010)
- Feature: Wheel scrolling in the console (r21982)
- Feature: Console command to reset the engine pool. It removes the traces of engines which are no longer associated to a NewGRF, and can be used to e.g. 'fix' scenarios which were screwed up by the author. You can only use it when there are no vehicles in the game though (r21975)
- Feature: Add a setting to enable/disable funding local road reconstruction (r21974)
- Feature: Introduce 'minimal' number of industries as a replacment for the old 'none' setting in the new game window (r21969)
- Change: When loading old savegames with long trains set the maximum train length to the length of the longest train (r22061)
- Change: Always report mammoth trains are disabled to NewGRFs, and allow the maximum train length to be modified in multiplayer as well [FS#4471] (r22004)
- Fix: Remove invalid keycodes when reading hotkeys.cfg [FS#4510] (r22094)
- Fix: The server list did not get sorted with one item in it, so the 'position in the list' variable was never updated causing problems when using the keyboard shortcuts for scrolling [FS#4514] (r22093)
- Fix: When deleting towns, only relocate objects during DC_EXEC (r22087)
- Fix: [Windows] If fullscreen fails with current resolution, use desktop resolution [FS#4489] (r22081)
- Fix: The owner view of the smallmap was not updated after a company colour change (r22079)
- Fix: Maximum train length interfered with wagon replacement when wagon removal was turned on [FS#4499] (r22078)
- Fix: NewGRFs with invalid multi-tile houses could cause a valid 1x1 house following it to be seen as multi-tile, causing crashes [FS#4501] (r22075)
- Fix: Immediately update the train weight when you change the multiplier for train cargo weight (r22073)
- Fix: Some hotkey names in hotkey.cfg for the scenario editor toolbar were completely bogus (r22071)
- Fix: Crashes when disconnecting after requesting the map [FS#4503] (r22070)
- Fix: Delete all savegame packets, not just the first one (r22069)
- Fix: Return 'connection lost' instead of 'okay' when SendPackets closed the connection, so we do not try to do anything else with the closed socket (r22068)
- Fix: Do not hold a mutex when sending packets and thus possibly closing the connection as that wants to acquire the mutex again (r22067)
- Fix: Verify we can allocate an Order, OrderList, CargoPacket, CargoPayment, and others before we actually try to do so (all corner cases) [FS#4468] (r22066, r22057, r22047, r22042, r22040, r22033, r22031, r22026, r22025, r22024, r22023, r22022)
- Fix: Crash when disconnecting and reconnecting while the server is still saving the savegame [FS#4497] (r22064)
- Fix: Memory leak when saving with LZMA or zlib fails mid-way (r22062)
- Fix: Make the send chat message window follow the position of the status bar (r22059)
- Fix: Metric and imperial HP are not the same. As imperial HP are used internally, set a conversion rate for metric HP [FS#4408] (r22056)
- Fix: [Squirrel] Some invalid squirrel code caused the squirrel compiler to crash [FS#4490] (r22055)
- Fix: The land area information window was not updated after a language change (r22053)
- Fix: Roads under road stops would get a wrong owner after overbuilding (r22051)
- Fix: In ancient savegames, e.g. TTO savegames, non primary vehicles (wagons and such) could have unitnumbers or even orders. However, these orders would not be updated when a station is removed. As such some savegames have wagons with current orders to invalid stations which triggers trouble in the load conversion. So, trash any orders/unitnumbers a non-primary vehicle has [FS#4496] (r22050)
- Fix: [NewGRF] Company 0 does not always exist, so put temporary vehicles in a valid company (r22048)
- Fix: Make sure order indices stay in range when copying, sharing, unsharing or deleting all orders [FS#4487] (r22046)
- Fix: Update the consist cache when a part of a train is flipped in the depot [FS#4493] (r22044)
- Fix: Invalidate the right windows when a part of a train is flipped in the depot (r22043)
- Fix: Tab completion in chat did not cycle through all possible options (r22038)
- Fix: Crash when watching the vehicle view of a vehicle that has multiple sequential nearest depot orders (or consists of a single nearest depot order) when there is no depot with index 0 [FS#4488] (r22034)
- Fix: The server list got not resorted/redrawn after NewGRFs were downloaded [FS#4482] (r22029)
- Fix: When paused and having the allowed actions while paused setting on 'no actions' cheating money would fail [FS#4479] (r22016)
- Fix: Only show one AI per unique ID instead of all versions in the output of 'openttd -h' (r22007)
- Fix: Smoke/sparks of trains would be shown under bridges, or rather through bridges [FS#4480] (r22006)
- Fix: When the difference between force and resistance is smaller than the mass(*4) there would be no acceleration anymore, even when at higher (or lower) speed the force and resistance balance out better [FS#4473] (r21997)
- Fix: [YAPF] Under some circumstances vehicles could be lost [FS#4472] (r21996)
- Fix: [NewGRF] Make computations of closest-land/water-distances handle waterish tiles more correctly (r21994)
- Fix: When building a lock on dry land costs for clearing water were deducted rather than for building canals (r21993)
- Fix: AIs trying to change the AIOF_GOTO_NEAREST_DEPOT flag for existing orders triggered an assert. Explicitly forbid this as precondition for SetOrderFlags [FS#4467] (r21992)
- Fix: The share/copy-orders-cursor was not updated to refer to the new vehicle when it got autoreplaced/-renewed [FS#4466] (r21991)
- Fix: Vehicle status bar glitches on speed changes (r21989)
- Fix: Scrolling of the console in pages used wrong line height and scrolled too much (r21979)
- Fix: Redraw the town authority window after modifying town authority settings (r21973)
- Fix: Crash when a multiplayer company goes bankrupt with 'you' in it [FS#4464] (r21970)

Download: OpenTTD v1.1.0 RC 1
Source: Here