Serious Sam: Siberian Mayhem offers the series brand of gameplay in the Serious Sam 4 style and is a blast from beginning to end.
Half-Life: Opposing Force is a well made expansion and perfect for those looking for more Half-Life.
Thief 2X: Shadows of the Metal Age may not be official but it is an expansion worth playing through.
Painkiller: Resurrection is broken and poorly designed.
Painkiller: Overdose could use more polish in some areas but, overall, it’s a worthwhile expansion.
The Lost Legacy is another good adventure in the series and the pacing is better than that of Uncharted 4.
Call of Duty and its expansion offer a linear but explosive action-packed experience and it is still one of the best World War II shooters to date.
Doom 3 may not be the best Doom game but it’s perfect if you’re looking for a creepy and atmospheric shooter.
Crysis and Crysis Warhead are gorgeous games that don’t quite reach their full potential but they are still a blast to play.
Aliens versus Predator 2 is more polished than its predecessor with more refined gameplay but its linear level design is questionable.