65		Redneck Rampage (DOS, 1997)
60		The Adventures of Square (Windows, 2014)
60		Fly Simulator (Windows, 2017)
60		Sneaky Bears (Windows, 2017)
60		Cornflakestein (Windows, 2017)
60		Screencheat (Windows, 2014)
60		Batla Shooter (Windows, 2015)
60		Deer Avenger 4: The Rednecks Strike Back (Windows, 2001)
59		Counter-Strike: Source (Windows, 2004)
58		Counter-Strike: Global Offensive (Windows, 2012)
58		Serious Sam II (Windows, 2005)
58		Duke Nukem 3D (DOS, 1996)
55		Shadow Warrior (Windows, 2013)
55		Counter-Strike Online (Windows, 2008)
55		Shadow Warrior (DOS, 1997)
55		Half-Life 2 (Windows, 2004)
53		Left 4 Dead (Windows, 2008)
53		Robo Recall (Windows, 2017)
53		MDK (Windows, 1997)
53		MDK (DOS, 1997)
52		Duke Nukem Forever (Windows, 2011)
52		Left 4 Dead 2 (Windows, 2009)
52		Shadow Warrior 2 (Windows, 2016)
52		Half-Life 2: Episode Two (Windows, 2007)
52		MDK 2 (Windows, 2000)
51		Shadow Warrior (Windows, 2013)
51		MDK 2 HD (Windows, 2012)
50		Postal² (Windows, 2003)
50		Hangry Bunnies from Mars (Windows, 2017)
50		Dracula: Vampires vs. Zombies (Windows, 2017)
50		Rise of the Wool Ball (Windows, 2017)
50		Bovinator (Windows, 2001)
50		Half-Life 2: Episode One (Windows, 2006)
50		Shadow of the Wool Ball (Windows, 2016)
50		Winter Warland (Windows, 2017)
50		What the Box? (Windows, 2016)
50		Zombeer (Windows, 2015)
50		Deathmatch Classic (Windows, 2003)
49		Day of Defeat: Source (Windows, 2006)
47		Half-Life: Source (Windows, 2005)
47		Half-Life: Deathmatch - Source (Windows, 2005)
47		Half-Life 2: Deathmatch (Windows, 2004)
43		No One Lives Forever 2: A Spy in H.A.R.M.'s Way (Windows, 2002)
43		The Operative: No One Lives Forever (Windows, 2000)
40		Half-Life: Uplink (Windows, 1999)

Notes: Games similar to Team Fortress 2, Games like Team Fortress 2, Valve Corporation, Valve Corporation, Windows, Action, Shooter, Comedy, 1st-person, Source, PC, Game Similarities.