From the back of the box:
The Complete Half-Life 1 collection. Includes: Half Life©, Opposing Force©, Blue Swift© and Team Fortress Classic©.
Half-Life spawned a franchise of best-selling and critically-acclaimed single player and multiplayer action games. This amazing collection offers four of those games in one package: The original Half-Life, it's two official add-on packs plus Team Fortress Classic, one of the most popular online action games of all time.
Winner of numerous awards, including the Academy of Interactive Arts & Science's Game of the Year honors. Offers single and multiplayer content.
Battle fierce opponents and explore restricted areas of the Black Mesa Research Facility. Also includes new items for online play.
TEAM FORTRESS CLASSIC©
Engage in team-based warfare as Medic, Soldier, Sniper, Engineer or one of the five other roles. Each has unique weapons, items, and abilities.