THE FULL 99-WAVE CAMPAIGN
KOSMIC KEEP: LAST STAND
ONE KEEP
Hold the line. Break the Warden.
Your guns are automatic. Commit to lightning, spend carefully, and make three bombs count.
Six systems. Limited credits. Choose a specialty.
Hold BOLT to charge. Release between shots. Guns fire automatically.
- ← →
- Choose upgrade / difficulty
- Left Ctrl
- Select / buy
- Hold ↑
- Charge lightning; release between shots
- ↓
- Smart bomb · supplies every third wave after launch
- Space / P
- Pause
- S
- Toggle sound · attract screens and play
- Turret
- Aims and fires automatically
Field manual
Commit. Charging lightning stops both guns and shield regeneration. Release early to return to ordinary fire. After a bolt fires, release Up before charging again. Spinning triangles and saucers require your attention.
Specialize. All six systems have five upgrades. Each oval fills when purchased; the highlighted empty oval is next. The first steps are affordable; the final two tiers are investments for later sectors. A larger shield takes longer to begin recharging. Savings earn 5% on at most 200 credits per wave. Once shield is level 5, its slot buys a hull repair for 300 credits. Once lightning is level 5, its slot buys a bomb for 400 credits. Each supply is capped at three.
Defend cleanly. A wave without a shield or hull impact pays a 20-credit bonus. Every clear pays 12 credits. You start with one bomb. Supplies arrive at waves 4, 7, 10 and every third wave thereafter: one bomb and one hull point, each capped at three.
Break the Warden. Every ninth wave ends in a Warden fight. Early Wardens have three cores; later ones have four, and the final Warden at wave 99 has five. Break a core with lightning or a bomb. While it flashes blue, the remaining cores are shielded: fight the reinforcements and wait for gold. Clear each sector to advance. Destroy the final Warden and its remaining swarm to win the 99-wave campaign.