L4D3 Steam Status : r/l4d2

Steam Workshop::L4D2: High Definition Edition (Abandoned)

Steam Workshop::Left 4 Dead 2: The Remaster 2023 ✓

Left 4 Dead 3: the complete story so far

Left 4 Dead 2 - How to Play as L4D1 Survivors in L4D2 Campaigns

Valve builds entirely new 'Left 4 Dead 2' campaign with the community

Steam Workshop::L4D2 Modified Talker

Left 4 Dead 3 Screenshots Leaked - Here's What They Are

Valve doesn't need Left 4 Dead 3, it just needs to update Left 4

Is Left 4 Dead 1 better than Left 4 Dead 2? - Quora

Suspicious stats found in another Valve's employee : r/l4d2

Steam Workshop::L4D2 Modified Talker