The in game store is a hub where you can get upgrades for weapons, buy equipment, or get other supplies. You can mainly access this by going to "settings" and to the "store".
There are 8 upgrades you can buy in the game. Here are all of them:
- Boost regen (cost) - gives you more boost
- Health regen (cost)
- Boost duration (cost)
- Golden silenced desert eagle (cost)
- Accuracy increase (cost)
- Grenade +1 (cost)