Half-Life 2 is fairly linear so, you won’t be wasting much time getting lost. It’s a true FPS game so, load up and charge on.
Walkthroughs pretty much consist of showing you how to survive each area. There isn’t any strategy involved except in how to kill hostiles and incur as little damage as possible.
Some help in finding health, energy, ammo, weapons and other items strewn around the world.
…HL2 is the sequel to the original Half-Life from Valve, released in 1998. HL2 was followed by HL2 Episode One and Episode Two. All three take place in the same timeline.