treeIcon1 from Opengameart.org
enemyIcon1 from Opengameart.org
"Attribute Stephen "Redshrike" Challener as graphic artist and William.Thompsonj as contributor. If reasonable link to this page or the OGA homepage."
playerIcon1 from Opengameart.org
TerrainToolsSampleAssets from the Unity Team
Dani Devy - Grappling Gun(modified): Github.com
Motocross menu image Pixabay.com
Cinemachine UnityPackage: Docs.unity3d.com
Immortal font:
1001freefonts.com
Eve by J.Gonzoles, Alex, Swat, and Gas Mask from Mixamo.com
Motorcycle idle sounds from Soundjay.com
Motorcycle driving sounds from Zapsplat.com
Spark Particle Effects from Sherbb's Particle Collection from the Asset Store.
Skybox series free by Avonix from unity store (listed as skyserie freebie in project)
Bullet Impact Sounds from Actionvfx.com
Grenade sounds from Zapsplat.com
Addition to list of credits:
Tank model: Free3d.com
Duane's Mind Transport Helicopter from Unity Asset Store