You might want to check this out:
Chiland.pl - the single player Chi Land,
it's still beta (no save progress yet)
My name is Jacek Piętal and I am the author of this free online game. Old school top down pixelated shooter. The map is infinite. The upgrades are coming every week. No registration required to play. There are two conflicting teams. They both have access to special powers, but need life energy Chi to power them. The other team is attacking your team! Protect your team with the power of Hado (unlimited energy blast), Speed (multiply your speed), Thor (fire thunder anywhere near you). The game works on Android browser or normal Computer browser. You are never alone. There are a few bots online trying to blast what's near them. It's free to play. It's single player. It's a browser RPG-like shooter game, a cross-over of Zelda + Quake. The goal is currently to have fun. Players of the same team (enemies) don't frag (hit) each other.