Steam has added the shooter Loadout to its list of early access games. The cartoon styled third-person shooter is chock full of character and weapon customization (over 50,000,000,000 total combinations). You can change every imaginable part of the gun, with each piece changing the gun’s stats in the process.
The full game will be Free to Play when it releases (and is already free if you’ve been lucky enough to snag a beta key), but for now early access costs a fee depending on what package you want. The packages range from $20 for the basic which includes the usual swag such as ingame currency, cosmetic items and some unlocked weapons, up to $90 for the founders pack which is probably best defined as the pack that allows you to name one of the AI bots in the game permanently. Whether that is worth $90 dollars or not is a whole other discussion point.