Am 28. Juni wird Valve Software ein kostenloses Mappack für Day of Defeat: Source (ab 39,95€ bei kaufen) über Steam veröffentlichen. Mit dem Upgrade wird der neue Spielmodus "Detonation" auf den Karten "Jagd" und "Colmar" eingeführt. Auch einige technische Verbesserungen und Änderungen am Gameplay (überarbeitete Waffen-Balance, genauere Trefferzonen, etc.) werden vorgenommen.

New Missions Added:

Colmar (June 2006) -- Set in Northern France, Colmar introduces Day of Defeat's Detonation style of gameplay. Marred with cold weather conditions, Colmar's Detonation objectives drive successful teams to attack target areas in unison.

Jagd (June 2006) - Jagd challenges teams to a more advanced urban Detonation mission, one that must be completed in a limited amount of time and is therefore unforgiving to unorganized offensive attacks.

Technology Updates:

• Color Correction
• Film grain
• New Shaders:
  • Image-based texture blending
  • Light warping
  • Phong Shading/Rim Lighting on player models Improved Animations Support for Bloom on DX8 level GPUs Prop Vertex Lighting Engine Optimizations

Gameplay Enhancements:

• Spawn Clip adjustments
• Improved Hit location detection
• Weapon balancing
• Detonation Gameplay Introduced
• Player Statistics