Half-Life 2's game-play length depends mainly on whether or not you mind watching conversations in-game or running ahead while NPCs are still delivering their lines. It is suggested that you take in the story.
Without paying attention to story, 4-5 hours
Paying attention to story, 5-10 hours depending on the player and their devotion to Achievements/Trophies/Steamworks Medals (ie. see Lambda Locator achievement)
(Times are roughly estimated as I've played through it both quickly and taking my time)
Half-Life, Half-Life: Blueshift, Half-life: Opposing Force, Half-life: High Definition pack (might not classify as a game), Half-Life: Source, Half-Life 2, Half-Life 2: Episode 1, and Half-Life 2: Episode 2. Eight games total not including countless mods created by fans that you can download for free on moddb.com and fileplanet.com. Other games by Valve software include Left 4 Dead, Left 4 Dead 2, Portal, Portal 2, Counter Strike, Counter Strike: Source, Team Fortress, Team Fortress 2, and Alien Swarm. Another Half-Life game would be Half-Life: Decay. You might also be able to count Half-Life Deathmatch and Half-Life 2 Deathmatch.
Only for the half life 2 version of garry's mod.
Gordon Freeman
No it is not. It requires one of the games in the half life 2 series such as TF2 portal or half life 2.
By co-op you mean mulitplayer. Yes. Half-Life 2: Deathmatch is only on PC.
portal 2 for sure although knowing valve it'll take a long time but hopefully after that half life 2 episode 3 and or half life 3
No, only Half-Life and Half-Life: Decay.
Half Life 2 Half Life 2: Episode 1 Half Life 2: Episode 2 Portal Team Fortress Hope this helps ;)
Buy Half Life: Source Or Buy Garrysmod a Half-Life 2 Modification and get the addon "Half-Life Rennaisance" Link to Half Life Rennaisance: http://www.garrysmod.org/downloads/?a=view&id=57033 Enjoy!
The half life is 25 hours so to be safe 2 days?
The half-life of an atom is how long it takes for half of the atom's mass to radioactively decay. This occurs exponentially; therefore, after 2 of the atom's half-lives have passed, 3/4 of the atom will have decay (half during the first half-life, then half of the remaining mass, or one quarter, during the second).
The villain's name in Half Life 2 was Wallace Breen.
There is no "Half Life 3" If you're talking about Half-Life 2, then no, but you can get Counter-Strike.
im guessing this is an old question, HL2 came out quite a long time ago
The longest half life for a seaborgium isotope is a little more than 2 minutes.
The Moddb website is a great for Half-Life 2 modifications.
Yes you do. Counterstrike: Condition Zero, however, is not a mod of Half Life, and therefore, does not need Half Life to acquire.