OpenTTD v1.0.5 RC1 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 v1.0.5 RC1 Changelog:
- Change: Make OpenTTD aware of XZ/LZMA compressed savegames so loading those gives a proper error message (r21047)
- Change: Make it possible to make .tar.xz bundles (r21042)
- Fix: Missing default values for the custom town number in the world generation options (r21034)
- Fix: Dropdown menu glitched in small screenshots, when issueing them from the menu (r21031)
- Fix: Do not let the resize button go past the bottom of the screen [FS#4176] (r21015)
- Fix: The detailed performance rating window could be too narrow [FS#4102] (r21010)
- Fix: For the compact notation 1.000.000k and 1.000M would be shown depending on the initial (and later rounded) value. Make everything that would round to 1.000.000k be drawn as 1.000M as well (r21009)
- Fix: Do not consider the text direction character when searching for missing glyphs (r21007)
- Fix: Chat/console messages got sometimes messed up due to LTR names in RTL translations and vice-versa [FS#3746] (r21006, r21004)
- Fix: Size of sort buttons for order and vehicle list gui could be too small (r20997)
- Fix: [NewGRF] The X and Y offsets in the parameter for industry vars 60, 61, 62, 63 are unsigned instead of signed (r20996)
- Fix: When removing a rail station, do not leave track under non-station tiles (r20990)
- Fix: [NewGRF] Ignore the variable for Action7/9 condition type 0x0D and 0x0E as documented (r20979)
- Fix: Crash when, while the ´go to´ cursor is active, you open the order list of a vehicle of another company and then select a ´go to´ destination [FS#4159] (r20916)
- Fix: Helicopters fired a bit too late [FS#4155] (r20910)
- Fix: Road/water toolbars did not get updated when the first vehicle of their type becomes available [FS#4141] (r20856)
- Fix: Smallmap legend buttons must all be equal in size, even if their contents is not (r20851)
- Fix: Deadlock when aborting map generation on Windows [FS#3707] (r20822)
- Fix: Be a bit more lenient with invalid savegames; do not crash on saveload related NOT_REACHEDs, just show the user an error that the savegame is corrupted [FS#3714] (r20819)
- Fix: Make the crash-on-saveload message clearer and more correct [FS#3791] (r20818)
- Fix: [NewGRF] Clamp/convert some vehicle variables so NewGRFs get their specified range (r20800, r20799, r20792)
- Fix: [NoAI] Document that AITile::HasTransportType does not work for TRANSPORT_AIR [FS#4117] (r20798)
- Fix: [NewGRF] Disable houses without a size that are available according to their building flags (r20797)
- Fix: [NewGRF] Make sure all houses in the house spec array are valid. It was possible that part of a multitile house was not copied because the array was full (r20796)
- Fix: Building 2x2 houses did not work for 2x2 road layouts on all map sizes (r20791)
- Fix: [NewGRF] Remove a check which is wrong for NewGRF houses and serves no use for original houses [FS#4118] (r20790)
- Fix: Spelling mistake in Slovak real town names (r20787)
- Fix: Do autosave-on-exit as well when using kill/CTRL-C to terminate a dedicated OpenTTD (r20783)
- Fix: [NoAI] AIEventCompanyAskMerger was disguised as AIEventCompanyMerger (r20765)
- Fix: [NewGRF] Assert when an industry previously build on water was flooded because its NewGRF changed/is missing [FS#4112] (r20754)
- Fix: Do not use new game settings when creating many random towns/industries in the scenario editor [FS#4094] (r20712, r20711)
- Fix: Graphics glitch when switching to a different-sized font while the chat message box was visible (r20705)
- Fix: Vehicle lists of non-trains could not resize horizontally causing truncation of texts [FS#4123, FS#3955] (r20174)

Download: OpenTTD v1.0.5 RC1
Source:Here