Note: The Xen grenades can be picked up a couple of times in Chapter 5: The Northern Star, don’t worry and simply grab them from the plants holding them.ġ5. Xen Lootism - Snatch a Xen grenade from its resting place. Combine Harvester - Use the gravity gloves to loot an item off a living Combine soldier.ġ4. Tip: During Chapter 4: Superweapon you’ll encounter these Combine Heavy with shields that you can take out with two grenades.ġ3. Indirect Approach - Kill a Combine Heavy while their shield is up. Tip: During Chapter 3: Is or Will Be you’ll encounter these grunts with gas tanks on their backs.ġ2. Pro-Pain - Kill a grunt by shooting their gas tank. Note: Make sure to pick up as much resin from the ground throughout the game, as you’ll need it to buy weapon upgrades with from the Combine weapon upgrade machines.ġ1. Up in Arms - Install your first pistol upgrade. Tip: At any point in the game where you see wooden crates, you can pick one up in your hands and then smash it to pieces by throwing it on the ground or into a wall.ġ0. Smash and Grab - Break open a supply crate with your hands. Zombie with a Shotgun - Collect the shotgun.Ġ9. Freshly Squeezed - Test your grip on a headcrab heart.Ġ6. Tip: In Chapter 1: Entanglement, pick up the nearby red bucket and roll it down the playground’s slide.Ġ5.
On a Roll - Interact with the playground somehow.