Like more than one of them
18 games close to two or more of WWII Online, Left 4 Dead 2 and Red Dead Redemption 2
Insurgency: Sandstorm
WWII Online, but co-op, and 11 times the hours
Liked · 85%FPS · ShooterAlso like Left 4 Dead 2
No More Room in Hell
Left 4 Dead 2, but free to play, and half the hours
Loved · 90%Zombies · SurvivalAlso like WWII Online
Easy Red 2
WWII Online, but team-based, and six times the hours
Loved · 90%World War II · FPSAlso like Left 4 Dead 2
Fallout: New Vegas
Red Dead Redemption 2, but an action RPG, and single-player
Loved · 96%Western · Open worldAlso like Left 4 Dead 2
Enlisted
WWII Online, but PvP, and five times the hours
Liked · 81%World War II · Vehicular CombatAlso like Left 4 Dead 2
Call of Duty: World at War
WWII Online, but with zombies, and nine times the hours
Loved · 92%World War II · FPSAlso like Left 4 Dead 2
Tom Clancy's Ghost Recon Wildlands
Red Dead Redemption 2, but a stealth game, and co-op
Mixed · 78%Open world · Third-Person ShooterAlso like WWII Online and Left 4 Dead 2
Day of Infamy
WWII Online, but eight times the hours
Liked · 82%World War II · FPSAlso like Left 4 Dead 2
Day of Defeat: Source
WWII Online, but team-based, and seven times the hours
Loved · 92%World War II · FPSAlso like Left 4 Dead 2
Call of Duty 2
WWII Online, but five times the hours
Loved · 94%World War II · FPSAlso like Left 4 Dead 2
Ravenfield
WWII Online, but single-player, and 11 times the hours
Loved · 97%FPS · ShooterAlso like Left 4 Dead 2
WARMODE
WWII Online, but about survival, and co-op
Divisive · 62%FPS · Massively MultiplayerAlso like Left 4 Dead 2
Tom Clancy's The Division
WWII Online, but post-apocalyptic, and 22 times the hours
Mixed · 71%Massively Multiplayer · ShooterAlso like Left 4 Dead 2
Z1 Battle Royale
Left 4 Dead 2, but an MMO, and open world
Divisive · 56%Zombies · SurvivalAlso like WWII Online
Battlefield: Bad Company 2
WWII Online, but with destruction, and six times the hours
Liked · 85%FPS · ShooterAlso like Left 4 Dead 2
BLOCKADE 3D
Left 4 Dead 2, but pixel art, and a third of the hours
Divisive · 59%Zombies · FPSAlso like WWII Online
PlanetSide 2
WWII Online, but sci-fi, and 20 times the hours
Liked · 80%Massively Multiplayer · FPSAlso like Left 4 Dead 2
More like WWII Online
6 games closest to WWII Online of your picks
Rising Storm/Red Orchestra 2 Multiplayer
WWII Online, but team-based, and 14 times the hours
Loved · 93%World War II · FPS
World of Tanks Blitz
WWII Online, but 26 times the hours
Mixed · 78%World War II · Massively Multiplayer
More like Left 4 Dead 2
6 games closest to Left 4 Dead 2 of your picks
How this list is made
Each game is measured against each of your picks the way a games-like list measures it: the Steam community tags, Steam genres and IGDB themes they share, each counting for more the fewer games carry it. A game's place is how alike it is to your picks together, as a share of each pick's best match, so one alike to two of them comes before one alike to just one. It must be close to at least one of them, as close as it would have to be on that game's own list.
None of your picks is on the list, nor a second release of one, nor a game of their own series. Up to 30 games are shown. Under each name, the kinds it shares with the pick it is closest to, and how it differs from that pick.