Outpost Siege

Top-down survival shooter with base defense. Every night an alien swarm marches on your Outpost's Core: move your Operator around the arena, mow down hundreds of enemies, collect Scrap and use your skill at the right moment. Scrap is also XP: every level-up lets you pick a new weapon (blades, lightning, rockets, fire aura, scattergun, frost) or an upgrade and push it to its evolution. By day, build and evolve turrets around the Core in limited slots, so every build is a real choice, and buy stratagems: airstrike, minefield, Core shield. Clear a 10-night Sector with a boss finale, take on the new Daily Operation every day, then spend Alloys in the Workshop on permanent upgrades. Six Operators with their own skills, two arenas, 29 achievements.