Overpass ( de_overpass) is a Bomb Defusal map for , released in the Counter-Strike: Global Offensive Winter Offensive update along with the map Cobblestone.
The Counter-Terrorists spawn in
bombsite A, where the disabled cargo truck is located at. Meanwhile, the Terrorists' Spawn Zone is around the bottom of the canal.
Bombsite B is located below the CT Spawn Zone and can easily be accessed from a stairwell. In here, snipers can easily guard here as a sniper nest is positioned towards the entire site.
It is based on a canal overpass set in Berlin, Germany. The
GSG-9 must protect a stalled military shipment on a canal overpass while the Phoenix Connexion can either attack the shipment head-on or attempt to destroy the overpass itself.
"Fnatic boost"/Pixel Walking
Bomb site A, two players boost a third player near the barrier adjacent the crashed truck. The second player is actually standing on a mis-clipped ledge, making it appear as though the player is floating, known as "pixel walking" . The boost allows the top player to see over the high barrier and through some invisible walls to preform recon or even attack Terrorist players advancing on  Bomb site B, without putting the player in harm's way. Since the area is not reachable by normal means, it was deemed an exploit during the DreamHack Winter 2014 tournament and subsequently fixed as part of the December 4, 2014 patch.
The boost gets its name from a quarter final match during the DreamHack Winter 2014 tournament between Fnatic and Team LDLC.com. After the first two maps, LDLC and Fnatic were tied at one game a piece. At the half of the last map, Overpass, LDLC were leading 12-3. Fnatic switched to CT side and ended up winning the game using the boost. Afterwards, a formal protest was filed and submitted for review
. Before the semi-final matches started, it was decided the match was to be replayed. Prior to the rematch, however, Fnatic resigned, giving LDLC the win. Team LDLC then went on to win the tournament.
This is one of the first completely new maps from Global Offensive (besides the Arsenal maps), since Mirage is adopted from a custom map, de_cpl_strike.
The Tower visible in the map is not actually the Berlin TV Tower in Berlin. It is, instead, the Nuremberg TV Tower in Bavaria.
The skybox of this map is actually a picture of Prague instead of Berlin, as indicated by the Prague Castle being in the skybox.
The name of the park is "Parkanlage Schöneck" (Schöneck Park).
Graffiti located near the Mid Door contains the number 24724, the zip code of the rural community Freeman, West Virginia, a reference to Gordon Freeman, the protagonist of Valve's Half-Life series.
 3 ATMs can be found near the CT spawn zone. If one shoots these ATMs sufficiently enough, the ATMs will break and will spew out cash bundles.
The song "The Part Where He Kills You" from can be heard playing behind a pair of metal doors located at Portal 2 T Box.
The sound file can be found in /csgo/pak01_dir.vpk/sound/ambient/misc/techno_overpass.wav
Several map assets for Overpass were reused from Depot and Embassy, both of which are cut maps.
December 18, 2013
Added Cobblestone and Overpass maps, which are available to community servers and offline play. Official matchmaking is limited to Operation Bravo in order to collect additional map balancing data prior to a wider release.
January 23, 2014
Moved CT van to give more effective cover
Made CT van climbable
Moved fences to give more space
Removed red car
Widened door into back of A
Blocked visibility from bridge to canal
Tweaked position/rotation of truck
Made corridors and stairs under A wider
Moved Bombsite B to CT side of pillar, extended area with a platform to give more space and cover
Made players in sniping room easier to silhouette against the background
Made cement sacks climbable
Opened up wall on CT side
Made bridge wider
Moved up CT spawns and pushed T spawns further back
Increased C4 radius to 500 from 400
Railings in sniper room no longer blocks bullets or grenades
Added light to sniper room balcony
Made upper door in park connector wider
Made park connector easier to navigate
Made corridor near T spawn wider
Brighter ambient lights in canal pipes
Made climbing thing in playground more solid
Made bathroom corridor wider
Made windows in bathrooms breakable
Added spectator fixed camera positions
Tweaked soundscape settings
Fixed various minor bugs
February 5, 2014
Changed cover in playground.
Fixed smoke sorting on water.
Made players easier to see in park connector stairs.
Raised upper park divider to prevent peeking over it.
Increased ambient lighting.
Made bridge near Bombsite B twice as wide.
Made it easier to spot players in T side of canal.
Simplified the layout of Bombsite B slightly.
Removed small tree at CT side of upper park.
Blocked visibility through truck in Bombsite A.
February 12, 2014
Removed small cover on CT side of Bombsite B.
Drastically reduced the number of trashcans.
Widened tunnel near T spawn.
Widened lower door in park connector.
Widened corridor near CT sniper room.
February 20, 2014
Smoothed out movement on truck in Bombsite A
Simplified cover in bombsite B
Removed some trees in upper park
Smoothed out ground in canal
Removed small walls near playground entrance
Tweaked cover in playground
Small fence at birthday area no longer block bullets/grenades
Simplified corridor to CT sniper position
Improved player visibility
March 6, 2014
Added more cover in Bombsite A
Widened gate at back of Bombsite A
Blocked fence completely at back of Bombsite A
Color coded tunnels under A
Removed dropdown into water near bombsite B
Made cement bags around bombsite B easier to climb
Added cover near construction
New connector between upper park and bathrooms
Widened tunnel near T spawn
General polish and optimization
March 26, 2014
Added connector from T water to T tunnels
Opened up small concrete hut near Bombsite A
Made wood stack near door to A tunnels climbable
Made it possible to shoot through wood wall near Bombsite B
Made area near fountain in park slightly larger
Tweaked environment light
May 1, 2014
Removed one-way dropdown near entrance to bombsite B, making the site easier to defend
Reduced volume of environment sounds
Removed ramp at back of truck in Bombsite A
Added cover in T side of canal
Made upper park divider wider
Improved visibility in park
May 28, 2014
Redesigned the connector between canal and park
Made tunnels under Bombsite A easier to navigate
Added lights to hut near Bombsite A
July 1, 2014
July 16, 2014
The bank side door has been opened to reveal a new path into A.
The back A stairs have been flipped to enter nearer to the bomb plant zone.
A site has been opened up, the APC has been moved back and a new box has fallen off of the semi.
“Quickfall” palettes have been added to the bottom of ladder on T-side tunnels to allow for quick decent (ala Nuke).
The flower box at the CT sniper spot at Long A is now higher.
The connector tunnels have become more spacious.
One of the windows in Connector Tunnels has been opened up (for possibilities…).
Removed shelf in sniper nest above A to allow grenade damage through.
Stomped some flowers in the box outside bathrooms leading to A because they got in the way of an important sight-line.
Added a light to the bathroom connector to Long A. This improves visibility of players looking from mid connector.
Fixed the steam pipes on connector to no longer leak steam.
Clipped a few more areas to smooth movement and cleaned up nav mesh.
Updated radar image.
Thanks to iBP steel and c0tt0n
July 17, 2014
Fixed the A box not having its clip brush enabled.
Fixed some unfair peek and boost spots around the map.
Added some clip brushes to smooth movement.
Fixed the sign decal on the bank.
August 27, 2014
Updated based on feedback and observations from ESL One Cologne
Removed tall sandbags near Bombsite B which could be used to two-man boost onto and peek/shoot into T water
Added a intended boost spot in its place, where you can two-man boost. Wall near position is bangable from both sides.
Removed boost on green wall in playground
Removed position on toilet mid entrance which could be used to get an angle on toilet entrance
Fixed some spots where C4 could get stuck
Removed grass on low cover near Bombsite A which obstructed peeking
Changed some textures and lighting to improve visibility and reduce environment noise
Moved lightpost at entrance to Bombsite A to remove gap
Closed off hut at Bombsite A
Railing outside of squeaky door no longer blocks bullets or grenades
September 30, 2014
Fixed a bug where it was possible to defuse a bomb in A site from B balcony
Added collision to top of pillars in Park
Added a boiler to room next to A pit (now known as Boiler)
December 4, 2014
Bombsite A plant trigger has been extended
Added visual hints to the usable bombplant zones
Removed A pit stairs, replaced with jump
Fixed some overpowered boosts
HLTV.org - LDLC file protest over fnatic boost
HLTV.org - LDLC file protest over fnatic boost
YouTube.com - Cs:Go Overpass - Portal 2 Easter Egg