Megabonk level-ups, Overwatch hero cards, in Left 4 Dead 2.
Megabonk-style level-ups and 31 stacking upgrade cards, including Overwatch 2 hero ability cards (Mei's ice blast, D.Va boosters, Roadhog's chain hook, Winston jump pack, Genji deflect), in any Left 4 Dead 2 campaign. Kill infected to earn XP; every level-up freezes the world and offers three cards (Shift + A/W/D to pick). Survive to the finale and beat the Tank.
Solo. Based on RE. tangle's Left 4 Bonk VScript pattern (remix-friendly). Free under Valve's SDK terms.
Design sheets included; fork the JSON and regenerate. Left 4 Dead 2, Megabonk and Overwatch 2 are their owners' properties.