Smile Protocol

Summary

A single-player survival FPS with story sectors, a fixed wave mode, and an endless hostage mode you can extract from at any time to bank your coins. Spend earnings at the Trader and Shop on weapons, armor and keys, then open cases for weapon skins, attachments, gloves and grenade skins.

• Three modes: story sectors, fixed waves, endless hostage
• Custom rules like headshot-only raise your reward multiplier
• Pick enemy type: humanoids, aliens or skeletons