Fallout: New Vegas is a singleplayer first-person open world RPG shooter. The game is not a direct sequel to its predecessor Fallout 3, but follows events from Fallout and Fallout 2. The game was developed by Obsidian Entertainment and some members of the development team had previously worked on Fallout and Fallout 2 whilst working at Black Isle Studios. The game shares much of its engine and assets as Fallout 3 and is also published by Bethesda Softworks.
The game was released on retail (Steam key) and on Steam on October 19, 2010. The game was later released DRM-free on GOG.com on June 2, 2017, and later released on Bethesda.net on January 16, 2020. The Bethesda.net version has recompiled exes which makes them incompatible with nearly all mods.
The game's PC launch was considered "buggy as hell" by many critics and players. However various official patches released until July 7, 2011, alleviated many of these bugs and performance issues.
Fallout: New Vegas is primarily monetized by four DLCs which could be considered large story expansion packs, in addition to some microtransactions which contain time-limited pre-order unlocks like weapons and ammo. From February 2012, the game was released as the Ultimate Edition which bundled all DLC and microtransactions and is normally only available to purchase as a bundle on PC as of 2012.
Modding is well supported using the officialy provided toolkit Garden of Eden Creation Kit on Steam (in the Steam Library under Tools section), and players have produced mods which fix many of the issues with the game post-official support. The largest collection of mods are available from Nexus Mods and there is an extensive modding forum, and the game does not have Steam Workshop support.
As of 2020, the game has stable performance on PC. However it is recommended that players add some mods, in particular, YUP, FNV 4GB Patcher, NVSE, see Essential improvements for more information.
Fallout - New Vegas
Ambient Occlusion compatibility
Ambient Occlusion usage
Ambient Occlusion setting
This fix should work, opposed to changes to the fallout_default.ini in the game's folder. Also, there is no need to add these lines every time you start up Fallout. Once added, the mouse acceleration should be disabled permanently. The following paragraphs should be obsolete but are kept for archive purposes.
If this fix doesn't work, load the Fallout: New Vegas launcher and then add the lines to Fallout.ini. However, you will have to add those lines every time you play Fallout. You can also make Fallout.ini read only, which will prevent mouse acceleration from being reset.
If this still doesn't work, find the following lines in the Fallout_default.ini and change them to match the following:
This is caused by conflicting character mods, this can usually be fixed with a compatibility patch or by using LOOT to fix the load order.
Setting "Actor Fade" to the maximum value should fix this.
Sync and Refresh
Maximum pre-rendered frames
"C:\Program Files (x86)\Steam\steamapps\common\Fallout New Vegas enplczru\fnv4gb.exe" -SteamAppId 22490
"C:\Program Files (x86)\Steam\steamapps\common\Fallout New Vegas\fnv4gb.exe" -SteamAppId 22490
CD "C:\Program Files (x86)\Steam\SteamApps\common\"
mklink /d "Fallout New Vegas" "D:\Steam\SteamApps\common\Fallout New Vegas"
C:\Program Files (x86)\Steam\SteamApps\common\Fallout New Vegas\FalloutNVLauncher.exe
C:\Program Files (x86)\Steam\SteamApps\common\
Can be fixed by disconnecting the controller. The controller can be reconnected after using the cheat console.
Delete Appmanifest files from the Game Library and restart Steam. Re-install the game and Steam will find the existing files.
Exchange the game's .exe-files with ones from the international version, available HERE.
Download Kegetys D3D9 Antilag HERE
If not using an ENB, extract d3d9.dll and antilag.cfg to the same folder as FalloutNV.exe. To adjust the FPS limit, edit antilag.cfg with a text editor and change the value for the Antilag setting. E.G: FPSlimit=40
If using an ENB, rename the kegetys d3d9.dll to d3d9_antilag.dll, put d3d9_antilag.dll in the same folder as FalloutNV.exe, open enblocal.ini, and change the first three settings to: