A campaign about one scientist against an occupied Earth
Half-Life 2 puts you back in the shoes of research scientist Gordon Freeman, pulled out of stasis in City 17 after the Seven Hour War left Earth surrendered to an alien occupation. You never speak; the people around you do the talking, and you pick up the crowbar again to fight back against the force that is draining the planet's resources and dwindling its population. The campaign is a long stretch of first-person shooting mixed with physics puzzles and world-building, and it comes with the Episode One and Episode Two expansions, which continue the story right after the base game ends. Progressing is automatic: finish an episode and the next one starts from the main menu.
Playing together with your group
Half-Life 2 is built as a single-player experience, but your group can still share it. Remote Play on Phone and Remote Play on Tablet let someone stream the game to a handheld device, and Remote Play Together lets friends join in over the stream so you can watch, take turns, or help out through the physics puzzles and firefight sections. Outside the campaign, Half-Life 2: Deathmatch is included in your Steam library with purchase of Half-Life 2 — fast multiplayer set in the same universe, where the physics system becomes a weapon. You can play straight deathmatch or pick Combine vs. Resistance teamplay, which gives your group two clear sides to organize around.
What to know before you start
The base game's tone shifts between tense, quiet exploration and horror-tinged sections with zombies and aliens, so expect some unsettling stretches alongside the action. Difficulty is adjustable, and there is a save-anytime system, so a tough arena does not force a long replay. For accessibility and comfort, the game offers captions and subtitle options, camera comfort, custom volume controls, adjustable difficulty, and you can play without timed input; full controller support including DualShock and DualSense is available. Commentary is optional, and you can enable it for background notes while playing. On the modding side, the Source SDK is included and Steam Workshop carries community content — full campaigns as well as replacements for weapons, enemies, and the UI. Steam Cloud handles your saves, and Steam Achievements track your progress through the campaign.