Halo Wars 2

This achievement, as well as "Piggyback!," can be knocked out very quickly in a 1v1 Skirmish match against the AI on Easy. That being said, head into the Skirmish lobby and make these setting changes:

• Map: Sentry
• Gametype: Strongholds
• Starting Supply: 9999
• Starting Power: 9999
• Fog of War: Off
• Unit Ability Cooldown: 200%
• Skulls: Emperor & Pain Train

Now choose Yapyap as your leader and begin the match. Once the match starts, build three Yapyap units at your base's Armory. Once the three Hero units are out on the battlefield, you can activate "Grunt Goblin" by pressing when the unit is selected. For the purposes of "Piggyback!" all you have to do is activate the ability; you don't need to hit any enemies with it. Repeat this process on all three Hero units as needed. Once the ability has been activated ten times, the achievement will unlock.

While you are waiting for the three Yapyap's "Grunt Goblin" ability to recharge, you can start building three or four Methane Wagons at your base's Fortress. In addition to this, start building Cannon Fodder at the Fortress. Once the Wagons and Fodder are out on the battlefield, select the Methane Wagon, move your reticle over a group of Infantry units, and press . This will cause the vehicle to fire methane shells at the selected Infantry units. You can repeat this process as many times as needed with the several Wagons/Fodder you have out on the map. Once you have fired fifteen methane shells at Infantry units, "That sweet smell of home" will unlock.